21120110001010 has 16 divisors (see below), whose sum is σ = 38392596003672. Its totient is φ = 8364400000000.

The previous prime is 21120110000879. The next prime is 21120110001047. The reversal of 21120110001010 is 1010001102112.

It can be written as a sum of positive squares in 4 ways, for example, as 20987549201089 + 132560799921 = 4581217^2 + 364089^2 .

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 7 ways as a sum of consecutive naturals, for example, 10455498991 + ... + 10455501010.

Almost surely, 2^{21120110001010} is an apocalyptic number.

21120110001010 is a deficient number, since it is larger than the sum of its proper divisors (17272486002662).

21120110001010 is a wasteful number, since it uses less digits than its factorization.

21120110001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20911000109.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21120110001010 its reverse (1010001102112), we get a palindrome (22130111103122).

The spelling of 21120110001010 in words is "twenty-one trillion, one hundred twenty billion, one hundred ten million, one thousand, ten".