102010012102021 has 4 divisors (see below), whose sum is σ = 103682307382444. Its totient is φ = 100337716821600.

The previous prime is 102010012102013. The next prime is 102010012102057. The reversal of 102010012102021 is 120201210010201.

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 47290171936225 + 54719840165796 = 6876785^2 + 7397286^2 .

It is a cyclic number.

It is not a de Polignac number, because 102010012102021 - 2³ = 102010012102013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102010012101992 and 102010012102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102010012102321) 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, 836147640120 + ... + 836147640241.

It is an arithmetic number, because the mean of its divisors is an integer number (25920576845611).

Almost surely, 2^{102010012102021} is an apocalyptic number.

It is an amenable number.

102010012102021 is a deficient number, since it is larger than the sum of its proper divisors (1672295280423).

102010012102021 is an equidigital number, since it uses as much as digits as its factorization.

102010012102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672295280422.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102010012102021 its reverse (120201210010201), we get a palindrome (222211222112222).

The spelling of 102010012102021 in words is "one hundred two trillion, ten billion, twelve million, one hundred two thousand, twenty-one".