Search a number
-
+
1000221012121 = 2573891910553
BaseRepresentation
bin11101000111000011101…
…00010111000010011001
310112121202010022000010011
432203201310113002121
5112341423034341441
62043254543321521
7132156260216152
oct16434164270231
93477663260104
101000221012121
1135621175a641
12141a23bb02a1
1373421ccbb46
14365a7938929
151b040d71581
hexe8e1d17099

1000221012121 has 4 divisors (see below), whose sum is σ = 1004112922932. Its totient is φ = 996329101312.

The previous prime is 1000221012113. The next prime is 1000221012169. The reversal of 1000221012121 is 1212101220001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 453516046096 + 546704966025 = 673436^2 + 739395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000221012121 - 23 = 1000221012113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000221012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1945955020 + ... + 1945955533.

It is an arithmetic number, because the mean of its divisors is an integer number (251028230733).

Almost surely, 21000221012121 is an apocalyptic number.

It is an amenable number.

1000221012121 is a deficient number, since it is larger than the sum of its proper divisors (3891910811).

1000221012121 is an equidigital number, since it uses as much as digits as its factorization.

1000221012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891910810.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1000221012121 its reverse (1212101220001), we get a palindrome (2212322232122).

The spelling of 1000221012121 in words is "one trillion, two hundred twenty-one million, twelve thousand, one hundred twenty-one".

Divisors: 1 257 3891910553 1000221012121