2021221112012 has 24 divisors (see below), whose sum is σ = 3550984116960. Its totient is φ = 1006659054720.

The previous prime is 2021221111979. The next prime is 2021221112059. The reversal of 2021221112012 is 2102111221202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071689 + ... + 2278367.

It is an arithmetic number, because the mean of its divisors is an integer number (147957671540).

Almost surely, 2^{2021221112012} is an apocalyptic number.

It is an amenable number.

2021221112012 is a deficient number, since it is larger than the sum of its proper divisors (1529763004948).

2021221112012 is a wasteful number, since it uses less digits than its factorization.

2021221112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208321 (or 1208319 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2021221112012 its reverse (2102111221202), we get a palindrome (4123332333214).

The spelling of 2021221112012 in words is "two trillion, twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, twelve".