2021121221210 has 64 divisors (see below), whose sum is σ = 4477760711424. Its totient is φ = 639623001600.

The previous prime is 2021121221201. The next prime is 2021121221243. The reversal of 2021121221210 is 121221211202.

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, 31099550 + ... + 31164470.

It is an arithmetic number, because the mean of its divisors is an integer number (69965011116).

Almost surely, 2^{2021121221210} is an apocalyptic number.

2021121221210 is an abundant number, since it is smaller than the sum of its proper divisors (2456639490214).

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

2021121221210 is a wasteful number, since it uses less digits than its factorization.

2021121221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99159.

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

Adding to 2021121221210 its reverse (121221211202), we get a palindrome (2142342432412).

The spelling of 2021121221210 in words is "two trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred ten".