21215510055410 has 512 divisors, whose sum is σ = 50836974796800. Its totient is φ = 6262603776000.

The previous prime is 21215510055401. The next prime is 21215510055419. The reversal of 21215510055410 is 1455001551212.

It is an interprime number because it is at equal distance from previous prime (21215510055401) and next prime (21215510055419).

It is a super-2 number, since 2×21215510055410² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21215510055419) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1545299426 + ... + 1545313154.

It is an arithmetic number, because the mean of its divisors is an integer number (99290966400).

Almost surely, 2^{21215510055410} is an apocalyptic number.

21215510055410 is an abundant number, since it is smaller than the sum of its proper divisors (29621464741390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21215510055410 is a wasteful number, since it uses less digits than its factorization.

21215510055410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13898.

The product of its (nonzero) digits is 10000, while the sum is 32.

The spelling of 21215510055410 in words is "twenty-one trillion, two hundred fifteen billion, five hundred ten million, fifty-five thousand, four hundred ten".