21020112101010 has 64 divisors (see below), whose sum is σ = 55154901262464. Its totient is φ = 5084634201600.

The previous prime is 21020112101003. The next prime is 21020112101099. The reversal of 21020112101010 is 1010121102012.

It is a super-2 number, since 2×21020112101010² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69539901 + ... + 69841520.

It is an arithmetic number, because the mean of its divisors is an integer number (861795332226).

Almost surely, 2^{21020112101010} is an apocalyptic number.

21020112101010 is an abundant number, since it is smaller than the sum of its proper divisors (34134789161454).

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

21020112101010 is a wasteful number, since it uses less digits than its factorization.

21020112101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139381899.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21020112101010 its reverse (1010121102012), we get a palindrome (22030233203022).

The spelling of 21020112101010 in words is "twenty-one trillion, twenty billion, one hundred twelve million, one hundred one thousand, ten".