20212002121220 has 96 divisors (see below), whose sum is σ = 52410416771328. Its totient is φ = 6375928960512.

The previous prime is 20212002121219. The next prime is 20212002121249. The reversal of 20212002121220 is 2212120021202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17528387 + ... + 18645866.

It is an arithmetic number, because the mean of its divisors is an integer number (545941841368).

Almost surely, 2^{20212002121220} is an apocalyptic number.

20212002121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212002121220 is an abundant number, since it is smaller than the sum of its proper divisors (32198414650108).

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

20212002121220 is a wasteful number, since it uses less digits than its factorization.

20212002121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36174589 (or 36174587 counting only the distinct ones).

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

Adding to 20212002121220 its reverse (2212120021202), we get a palindrome (22424122142422).

The spelling of 20212002121220 in words is "twenty trillion, two hundred twelve billion, two million, one hundred twenty-one thousand, two hundred twenty".