102032311021 has 4 divisors (see below), whose sum is σ = 102036419100. Its totient is φ = 102028202944.

The previous prime is 102032310997. The next prime is 102032311127. The reversal of 102032311021 is 120113230201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120113230201 = 46237 ⋅2597773.

It can be written as a sum of positive squares in 2 ways, for example, as 53610308521 + 48422002500 = 231539^2 + 220050^2 .

It is a cyclic number.

It is not a de Polignac number, because 102032311021 - 2³³ = 93442376429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102032310986 and 102032311004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102072311021) 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, 2016556 + ... + 2066533.

It is an arithmetic number, because the mean of its divisors is an integer number (25509104775).

Almost surely, 2^102032311021 is an apocalyptic number.

It is an amenable number.

102032311021 is a deficient number, since it is larger than the sum of its proper divisors (4108079).

102032311021 is an equidigital number, since it uses as much as digits as its factorization.

102032311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108078.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 102032311021 its reverse (120113230201), we get a palindrome (222145541222).

The spelling of 102032311021 in words is "one hundred two billion, thirty-two million, three hundred eleven thousand, twenty-one".