21001210002010 has 48 divisors (see below), whose sum is σ = 43974401105664. Its totient is φ = 7200342985248.

The previous prime is 21001210002001. The next prime is 21001210002023. The reversal of 21001210002010 is 1020001210012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78308767 + ... + 78576493.

It is an arithmetic number, because the mean of its divisors is an integer number (916133356368).

Almost surely, 2^{21001210002010} is an apocalyptic number.

21001210002010 is an abundant number, since it is smaller than the sum of its proper divisors (22973191103654).

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

21001210002010 is a wasteful number, since it uses less digits than its factorization.

21001210002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427835 (or 427828 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21001210002010 its reverse (1020001210012), we get a palindrome (22021211212022).

The spelling of 21001210002010 in words is "twenty-one trillion, one billion, two hundred ten million, two thousand, ten".