21102010022021 has 8 divisors (see below), whose sum is σ = 21418081530144. Its totient is φ = 20785971341520.

The previous prime is 21102010022017. The next prime is 21102010022039. The reversal of 21102010022021 is 12022001020112.

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 21102010022021 - 2² = 21102010022017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102010021987 and 21102010022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102010072021) 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, 6910130 + ... + 9484403.

It is an arithmetic number, because the mean of its divisors is an integer number (2677260191268).

Almost surely, 2^{21102010022021} is an apocalyptic number.

It is an amenable number.

21102010022021 is a deficient number, since it is larger than the sum of its proper divisors (316071508123).

21102010022021 is a wasteful number, since it uses less digits than its factorization.

21102010022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16413811.

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

Adding to 21102010022021 its reverse (12022001020112), we get a palindrome (33124011042133).

The spelling of 21102010022021 in words is "twenty-one trillion, one hundred two billion, ten million, twenty-two thousand, twenty-one".