20021012122220 has 12 divisors (see below), whose sum is σ = 42044125456704. Its totient is φ = 8008404848880.

The previous prime is 20021012122213. The next prime is 20021012122231. The reversal of 20021012122220 is 2222121012002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500525303036 + ... + 500525303075.

It is an arithmetic number, because the mean of its divisors is an integer number (3503677121392).

Almost surely, 2^{20021012122220} is an apocalyptic number.

20021012122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021012122220 is an abundant number, since it is smaller than the sum of its proper divisors (22023113334484).

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

20021012122220 is a wasteful number, since it uses less digits than its factorization.

20021012122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001050606120 (or 1001050606118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20021012122220 its reverse (2222121012002), we get a palindrome (22243133134222).

The spelling of 20021012122220 in words is "twenty trillion, twenty-one billion, twelve million, one hundred twenty-two thousand, two hundred twenty".