202122121210 has 8 divisors (see below), whose sum is σ = 363819818196. Its totient is φ = 80848848480.

The previous prime is 202122121189. The next prime is 202122121219. The reversal of 202122121210 is 12121221202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 199945805409 + 2176315801 = 447153^2 + 46651^2 .

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

It is not an unprimeable number, because it can be changed into a prime (202122121219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10106106051 + ... + 10106106070.

Almost surely, 2^202122121210 is an apocalyptic number.

202122121210 is a deficient number, since it is larger than the sum of its proper divisors (161697696986).

202122121210 is a wasteful number, since it uses less digits than its factorization.

202122121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20212212128.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202122121210 its reverse (12121221202), we get a palindrome (214243342412).

The spelling of 202122121210 in words is "two hundred two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred ten".