22120001220072 has 96 divisors (see below), whose sum is σ = 64334198937600. Its totient is φ = 6319447819776.

The previous prime is 22120001220071. The next prime is 22120001220073. The reversal of 22120001220072 is 27002210002122.

It is an interprime number because it is at equal distance from previous prime (22120001220071) and next prime (22120001220073).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22120001220071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12729888 + ... + 14362800.

It is an arithmetic number, because the mean of its divisors is an integer number (670147905600).

Almost surely, 2^{22120001220072} is an apocalyptic number.

It is an amenable number.

22120001220072 is an abundant number, since it is smaller than the sum of its proper divisors (42214197717528).

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

22120001220072 is a wasteful number, since it uses less digits than its factorization.

22120001220072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644455 (or 1644444 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

Adding to 22120001220072 its reverse (27002210002122), we get a palindrome (49122211222194).

The spelling of 22120001220072 in words is "twenty-two trillion, one hundred twenty billion, one million, two hundred twenty thousand, seventy-two".