22012121028 has 24 divisors (see below), whose sum is σ = 51365280960. Its totient is φ = 7336850080.

The previous prime is 22012121017. The next prime is 22012121029. The reversal of 22012121028 is 82012121022.

It is a super-3 number, since 3×22012121028³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22012120995 and 22012121013.

It is not an unprimeable number, because it can be changed into a prime (22012121029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134038 + ... + 248978.

It is an arithmetic number, because the mean of its divisors is an integer number (2140220040).

Almost surely, 2^22012121028 is an apocalyptic number.

It is an amenable number.

22012121028 is an abundant number, since it is smaller than the sum of its proper divisors (29353159932).

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

22012121028 is a wasteful number, since it uses less digits than its factorization.

22012121028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130907 (or 130905 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 22012121028 in words is "twenty-two billion, twelve million, one hundred twenty-one thousand, twenty-eight".