21110010020010 has 48 divisors (see below), whose sum is σ = 54921368351304. Its totient is φ = 5625711154176.

The previous prime is 21110010020009. The next prime is 21110010020023. The reversal of 21110010020010 is 1002001001112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7703405801001 + 13406604219009 = 2775501^2 + 3661503^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21110010019974 and 21110010020001.

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, 75377187 + ... + 75656726.

Almost surely, 2^{21110010020010} is an apocalyptic number.

21110010020010 is an abundant number, since it is smaller than the sum of its proper divisors (33811358331294).

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

21110010020010 is a wasteful number, since it uses less digits than its factorization.

21110010020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151035479 (or 151035476 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21110010020010 its reverse (1002001001112), we get a palindrome (22112011021122).

The spelling of 21110010020010 in words is "twenty-one trillion, one hundred ten billion, ten million, twenty thousand, ten".