21122011121122 has 16 divisors (see below), whose sum is σ = 33526180547712. Its totient is φ = 9959552088640.

The previous prime is 21122011121069. The next prime is 21122011121149. The reversal of 21122011121122 is 22112111022112.

It is a happy number.

It is a super-2 number, since 2×21122011121122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122011121122.

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, 3233617543 + ... + 3233624074.

It is an arithmetic number, because the mean of its divisors is an integer number (2095386284232).

Almost surely, 2^{21122011121122} is an apocalyptic number.

21122011121122 is a deficient number, since it is larger than the sum of its proper divisors (12404169426590).

21122011121122 is a wasteful number, since it uses less digits than its factorization.

21122011121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467241713.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21122011121122 its reverse (22112111022112), we get a palindrome (43234122143234).

It can be divided in two parts, 2112201 and 1121122, that added together give a palindrome (3233323).

The spelling of 21122011121122 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, one hundred twenty-one thousand, one hundred twenty-two".