21001122110012 has 24 divisors (see below), whose sum is σ = 40097101526832. Its totient is φ = 9545000256000.

The previous prime is 21001122109999. The next prime is 21001122110161.

21001122110012 is nontrivially palindromic in base 10.

It is a congruent number.

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, 23667893 + ... + 24539180.

It is an arithmetic number, because the mean of its divisors is an integer number (1670712563618).

Almost surely, 2^{21001122110012} is an apocalyptic number.

21001122110012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21001122110012 is a deficient number, since it is larger than the sum of its proper divisors (19095979416820).

21001122110012 is a wasteful number, since it uses less digits than its factorization.

21001122110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48216989 (or 48216987 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

It can be divided in two parts, 2100112 and 2110012, that added together give a palindrome (4210124).

The spelling of 21001122110012 in words is "twenty-one trillion, one billion, one hundred twenty-two million, one hundred ten thousand, twelve".