21020011122 has 32 divisors (see below), whose sum is σ = 46315934784. Its totient is φ = 6306632000.

The previous prime is 21020011109. The next prime is 21020011139. The reversal of 21020011122 is 22111002012.

It is a junction number, because it is equal to n+sod(n) for n = 21020011098 and 21020011107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1569993 + ... + 1583324.

It is an arithmetic number, because the mean of its divisors is an integer number (1447372962).

Almost surely, 2^21020011122 is an apocalyptic number.

21020011122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21020011122 is an abundant number, since it is smaller than the sum of its proper divisors (25295923662).

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

21020011122 is a wasteful number, since it uses less digits than its factorization.

21020011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153434.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21020011122 its reverse (22111002012), we get a palindrome (43131013134).

The spelling of 21020011122 in words is "twenty-one billion, twenty million, eleven thousand, one hundred twenty-two".