21201421410120 has 64 divisors (see below), whose sum is σ = 72690587694720. Its totient is φ = 4846039179264.

The previous prime is 21201421410083. The next prime is 21201421410137. The reversal of 21201421410120 is 2101412410212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12619892857 + ... + 12619894536.

It is an arithmetic number, because the mean of its divisors is an integer number (1135790432730).

Almost surely, 2^{21201421410120} is an apocalyptic number.

21201421410120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201421410120 is an abundant number, since it is smaller than the sum of its proper divisors (51489166284600).

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

21201421410120 is a wasteful number, since it uses less digits than its factorization.

21201421410120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25239787414 (or 25239787410 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21201421410120 its reverse (2101412410212), we get a palindrome (23302833820332).

The spelling of 21201421410120 in words is "twenty-one trillion, two hundred one billion, four hundred twenty-one million, four hundred ten thousand, one hundred twenty".