202121202103212 has 48 divisors (see below), whose sum is σ = 538990569411840. Its totient is φ = 57748840193472.

The previous prime is 202121202103201. The next prime is 202121202103217. The reversal of 202121202103212 is 212301202121202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (202121202103217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119494114 + ... + 121173782.

It is an arithmetic number, because the mean of its divisors is an integer number (11228970196080).

Almost surely, 2^{202121202103212} is an apocalyptic number.

It is an amenable number.

202121202103212 is an abundant number, since it is smaller than the sum of its proper divisors (336869367308628).

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

202121202103212 is a wasteful number, since it uses less digits than its factorization.

202121202103212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112230 (or 3112228 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 202121202103212 its reverse (212301202121202), we get a palindrome (414422404224414).

The spelling of 202121202103212 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred two million, one hundred three thousand, two hundred twelve".