22231212000 has 96 divisors (see below), whose sum is σ = 72829489824. Its totient is φ = 5928320000.

The previous prime is 22231211999. The next prime is 22231212061. The reversal of 22231212000 is 21213222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 914301 + ... + 938300.

It is an arithmetic number, because the mean of its divisors is an integer number (758640519).

Almost surely, 2^22231212000 is an apocalyptic number.

22231212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22231212000 is an abundant number, since it is smaller than the sum of its proper divisors (50598277824).

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

22231212000 is a wasteful number, since it uses less digits than its factorization.

22231212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852629 (or 1852611 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 22231212000 its reverse (21213222), we get a palindrome (22252425222).

The spelling of 22231212000 in words is "twenty-two billion, two hundred thirty-one million, two hundred twelve thousand".