21122101012 has 24 divisors (see below), whose sum is σ = 37266324480. Its totient is φ = 10474632000.

The previous prime is 21122101009. The next prime is 21122101081. The reversal of 21122101012 is 21010122112.

It is a super-2 number, since 2×21122101012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122100983 and 21122101001.

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, 3013512 + ... + 3020512.

It is an arithmetic number, because the mean of its divisors is an integer number (1552763520).

Almost surely, 2^21122101012 is an apocalyptic number.

It is an amenable number.

21122101012 is a deficient number, since it is larger than the sum of its proper divisors (16144223468).

21122101012 is a wasteful number, since it uses less digits than its factorization.

21122101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13071 (or 13069 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21122101012 its reverse (21010122112), we get a palindrome (42132223124).

It can be divided in two parts, 2112 and 2101012, that multiplied together give a palindrome (4437337344).

The spelling of 21122101012 in words is "twenty-one billion, one hundred twenty-two million, one hundred one thousand, twelve".