202121321210 has 8 divisors (see below), whose sum is σ = 363818378196. Its totient is φ = 80848528480.

The previous prime is 202121321201. The next prime is 202121321231. The reversal of 202121321210 is 12123121202.

It can be written as a sum of positive squares in 2 ways, for example, as 181144723321 + 20976597889 = 425611^2 + 144833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10106066051 + ... + 10106066070.

Almost surely, 2^202121321210 is an apocalyptic number.

202121321210 is a deficient number, since it is larger than the sum of its proper divisors (161697056986).

202121321210 is a wasteful number, since it uses less digits than its factorization.

202121321210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20212132128.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 202121321210 its reverse (12123121202), we get a palindrome (214244442412).

The spelling of 202121321210 in words is "two hundred two billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred ten".