22113123012 has 48 divisors (see below), whose sum is σ = 57897974400. Its totient is φ = 7298056800.

The previous prime is 22113122923. The next prime is 22113123017. The reversal of 22113123012 is 21032131122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22113123017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1002712 + ... + 1024527.

It is an arithmetic number, because the mean of its divisors is an integer number (1206207800).

Almost surely, 2^22113123012 is an apocalyptic number.

It is an amenable number.

22113123012 is an abundant number, since it is smaller than the sum of its proper divisors (35784851388).

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

22113123012 is a wasteful number, since it uses less digits than its factorization.

22113123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027353 (or 2027345 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 22113123012 its reverse (21032131122), we get a palindrome (43145254134).

The spelling of 22113123012 in words is "twenty-two billion, one hundred thirteen million, one hundred twenty-three thousand, twelve".