2021121311202 has 36 divisors (see below), whose sum is σ = 5094050653926. Its totient is φ = 577463231520.

The previous prime is 2021121311179. The next prime is 2021121311203. The reversal of 2021121311202 is 2021131211202.

It can be written as a sum of positive squares in only one way, i.e., 1302727759641 + 718393551561 = 1141371^2 + 847581^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2021121311203) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1145759499 + ... + 1145761262.

Almost surely, 2^{2021121311202} is an apocalyptic number.

2021121311202 is an abundant number, since it is smaller than the sum of its proper divisors (3072929342724).

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

2021121311202 is a wasteful number, since it uses less digits than its factorization.

2021121311202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291520783 (or 2291520773 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2021121311202 its reverse (2021131211202), we get a palindrome (4042252522404).

The spelling of 2021121311202 in words is "two trillion, twenty-one billion, one hundred twenty-one million, three hundred eleven thousand, two hundred two".