1012221001 has 8 divisors (see below), whose sum is σ = 1106460000. Its totient is φ = 918351840.

The previous prime is 1012220983. The next prime is 1012221013. The reversal of 1012221001 is 1001222101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1012221001 - 2⁵ = 1012220969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012221031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86716 + ... + 97693.

It is an arithmetic number, because the mean of its divisors is an integer number (138307500).

Almost surely, 2^1012221001 is an apocalyptic number.

1012221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012221001 is a deficient number, since it is larger than the sum of its proper divisors (94238999).

1012221001 is a wasteful number, since it uses less digits than its factorization.

1012221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184919.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1012221001 is about 31815.4208050122. The cubic root of 1012221001 is about 1004.0571839966.

Adding to 1012221001 its reverse (1001222101), we get a palindrome (2013443102).

It can be divided in two parts, 101222100 and 1, that added together give a palindrome (101222101).

The spelling of 1012221001 in words is "one billion, twelve million, two hundred twenty-one thousand, one".