21011102122 has 16 divisors (see below), whose sum is σ = 32594664960. Its totient is φ = 10151872848.

The previous prime is 21011102059. The next prime is 21011102137. The reversal of 21011102122 is 22120111012.

It is a super-2 number, since 2×21011102122² (a number of 21 digits) contains 22 as substring.

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, 1407273 + ... + 1422124.

It is an arithmetic number, because the mean of its divisors is an integer number (2037166560).

Almost surely, 2^21011102122 is an apocalyptic number.

21011102122 is a deficient number, since it is larger than the sum of its proper divisors (11583562838).

21011102122 is a wasteful number, since it uses less digits than its factorization.

21011102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829525.

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

Adding to 21011102122 its reverse (22120111012), we get a palindrome (43131213134).

The spelling of 21011102122 in words is "twenty-one billion, eleven million, one hundred two thousand, one hundred twenty-two".