2021220103212 has 72 divisors (see below), whose sum is σ = 5124740349456. Its totient is φ = 671690763264.

The previous prime is 2021220103207. The next prime is 2021220103237. The reversal of 2021220103212 is 2123010221202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130621108 + ... + 130636580.

It is an arithmetic number, because the mean of its divisors is an integer number (71176949298).

Almost surely, 2^{2021220103212} is an apocalyptic number.

It is an amenable number.

2021220103212 is an abundant number, since it is smaller than the sum of its proper divisors (3103520246244).

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

2021220103212 is a wasteful number, since it uses less digits than its factorization.

2021220103212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26287 (or 26282 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2021220103212 its reverse (2123010221202), we get a palindrome (4144230324414).

The spelling of 2021220103212 in words is "two trillion, twenty-one billion, two hundred twenty million, one hundred three thousand, two hundred twelve".