102021130997 has 4 divisors (see below), whose sum is σ = 102670947276. Its totient is φ = 101371314720.

The previous prime is 102021130987. The next prime is 102021131021. The reversal of 102021130997 is 799031120201.

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 47582441956 + 54438689041 = 218134^2 + 233321^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021130997 - 2³² = 97726163701 is a prime.

It is a super-2 number, since 2×102021130997² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021130987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324907904 + ... + 324908217.

It is an arithmetic number, because the mean of its divisors is an integer number (25667736819).

Almost surely, 2^102021130997 is an apocalyptic number.

It is an amenable number.

102021130997 is a deficient number, since it is larger than the sum of its proper divisors (649816279).

102021130997 is an equidigital number, since it uses as much as digits as its factorization.

102021130997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649816278.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 102021130997 in words is "one hundred two billion, twenty-one million, one hundred thirty thousand, nine hundred ninety-seven".