202121221002 has 32 divisors (see below), whose sum is σ = 421840258560. Its totient is φ = 64441077360.

The previous prime is 202121220991. The next prime is 202121221009. The reversal of 202121221002 is 200122121202.

It is not an unprimeable number, because it can be changed into a prime (202121221009) 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, 5076649 + ... + 5116307.

It is an arithmetic number, because the mean of its divisors is an integer number (13182508080).

Almost surely, 2^202121221002 is an apocalyptic number.

202121221002 is an abundant number, since it is smaller than the sum of its proper divisors (219719037558).

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

202121221002 is a wasteful number, since it uses less digits than its factorization.

202121221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76618.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202121221002 its reverse (200122121202), we get a palindrome (402243342204).

It can be divided in two parts, 2021212 and 21002, that multiplied together give a palindrome (42449494424).

The spelling of 202121221002 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty-one thousand, two".