22161750212 has 24 divisors (see below), whose sum is σ = 44401156800. Its totient is φ = 9481252320.

The previous prime is 22161750209. The next prime is 22161750269. The reversal of 22161750212 is 21205716122.

It is a happy number.

It is a super-2 number, since 2×22161750212² (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, 677087 + ... + 709062.

It is an arithmetic number, because the mean of its divisors is an integer number (1850048200).

Almost surely, 2^22161750212 is an apocalyptic number.

It is an amenable number.

22161750212 is an abundant number, since it is smaller than the sum of its proper divisors (22239406588).

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

22161750212 is a wasteful number, since it uses less digits than its factorization.

22161750212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386731 (or 1386729 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 22161750212 in words is "twenty-two billion, one hundred sixty-one million, seven hundred fifty thousand, two hundred twelve".