1021320101 has 8 divisors (see below), whose sum is σ = 1085422680. Its totient is φ = 957664768.

The previous prime is 1021320089. The next prime is 1021320107. The reversal of 1021320101 is 1010231201.

1021320101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 191822500 + 829497601 = 13850^2 + 28801^2 .

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 1021320101 - 2²² = 1017125797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021320107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107096 + ... + 116241.

It is an arithmetic number, because the mean of its divisors is an integer number (135677835).

Almost surely, 2^1021320101 is an apocalyptic number.

It is an amenable number.

1021320101 is a deficient number, since it is larger than the sum of its proper divisors (64102579).

1021320101 is a wasteful number, since it uses less digits than its factorization.

1021320101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223623.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1021320101 is about 31958.0991456000. The cubic root of 1021320101 is about 1007.0567849806.

Adding to 1021320101 its reverse (1010231201), we get a palindrome (2031551302).

Subtracting from 1021320101 its reverse (1010231201), we obtain a square (11088900 = 3330²).

The spelling of 1021320101 in words is "one billion, twenty-one million, three hundred twenty thousand, one hundred one".