22001212120 has 64 divisors (see below), whose sum is σ = 53321379840. Its totient is φ = 8146300800.

The previous prime is 22001212111. The next prime is 22001212187. The reversal of 22001212120 is 2121210022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22001212120.

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, 357196 + ... + 414235.

It is an arithmetic number, because the mean of its divisors is an integer number (833146560).

Almost surely, 2^22001212120 is an apocalyptic number.

22001212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001212120 is an abundant number, since it is smaller than the sum of its proper divisors (31320167720).

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

22001212120 is a wasteful number, since it uses less digits than its factorization.

22001212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771496 (or 771492 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22001212120 its reverse (2121210022), we get a palindrome (24122422142).

The spelling of 22001212120 in words is "twenty-two billion, one million, two hundred twelve thousand, one hundred twenty".