102102010202021 has 4 divisors (see below), whose sum is σ = 102315166800000. Its totient is φ = 101888853604044.

The previous prime is 102102010201981. The next prime is 102102010202039. The reversal of 102102010202021 is 120202010201201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102102010202021 - 2⁴² = 97703963690917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102102010201987 and 102102010202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102010202051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106578298271 + ... + 106578299228.

It is an arithmetic number, because the mean of its divisors is an integer number (25578791700000).

Almost surely, 2^{102102010202021} is an apocalyptic number.

It is an amenable number.

102102010202021 is a deficient number, since it is larger than the sum of its proper divisors (213156597979).

102102010202021 is an equidigital number, since it uses as much as digits as its factorization.

102102010202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213156597978.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102102010202021 its reverse (120202010201201), we get a palindrome (222304020403222).

The spelling of 102102010202021 in words is "one hundred two trillion, one hundred two billion, ten million, two hundred two thousand, twenty-one".