20021200222120 has 64 divisors (see below), whose sum is σ = 45184088250000. Its totient is φ = 7984240816128.

The previous prime is 20021200222087. The next prime is 20021200222139. The reversal of 20021200222120 is 2122200212002.

It can be written as a sum of positive squares in 8 ways, for example, as 12890986521604 + 7130213700516 = 3590402^2 + 2670246^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021200222094 and 20021200222103.

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, 88575006 + ... + 88800754.

Almost surely, 2^{20021200222120} is an apocalyptic number.

20021200222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021200222120 is an abundant number, since it is smaller than the sum of its proper divisors (25162888027880).

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

20021200222120 is a wasteful number, since it uses less digits than its factorization.

20021200222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232462 (or 232458 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20021200222120 its reverse (2122200212002), we get a palindrome (22143400434122).

The spelling of 20021200222120 in words is "twenty trillion, twenty-one billion, two hundred million, two hundred twenty-two thousand, one hundred twenty".