21012000021122 has 16 divisors (see below), whose sum is σ = 34517059824672. Its totient is φ = 9513746027520.

The previous prime is 21012000021091. The next prime is 21012000021137. The reversal of 21012000021122 is 22112000021012.

It is a super-2 number, since 2×21012000021122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012000021097 and 21012000021106.

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 7 ways as a sum of consecutive naturals, for example, 1858147868 + ... + 1858159175.

It is an arithmetic number, because the mean of its divisors is an integer number (2157316239042).

Almost surely, 2^{21012000021122} is an apocalyptic number.

21012000021122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012000021122 is a deficient number, since it is larger than the sum of its proper divisors (13505059803550).

21012000021122 is a wasteful number, since it uses less digits than its factorization.

21012000021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716307313.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012000021122 its reverse (22112000021012), we get a palindrome (43124000042134).

The spelling of 21012000021122 in words is "twenty-one trillion, twelve billion, twenty-one thousand, one hundred twenty-two".