20122220220072 has 16 divisors (see below), whose sum is σ = 50305550550240. Its totient is φ = 6707406740016.

The previous prime is 20122220220061. The next prime is 20122220220073. The reversal of 20122220220072 is 27002202222102.

It is a happy number.

It is a super-2 number, since 2×20122220220072² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 838425842503 = 20122220220072 / (2 + 0 + 1 + 2 + 2 + 2 + 2 + 0 + 2 + 2 + 0 + 0 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (20122220220073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419212921228 + ... + 419212921275.

It is an arithmetic number, because the mean of its divisors is an integer number (3144096909390).

Almost surely, 2^{20122220220072} is an apocalyptic number.

It is an amenable number.

20122220220072 is an abundant number, since it is smaller than the sum of its proper divisors (30183330330168).

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

20122220220072 is a wasteful number, since it uses less digits than its factorization.

20122220220072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838425842512 (or 838425842508 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

Adding to 20122220220072 its reverse (27002202222102), we get a palindrome (47124422442174).

The spelling of 20122220220072 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty million, two hundred twenty thousand, seventy-two".