210121212021212 has 6 divisors (see below), whose sum is σ = 367712121037128. Its totient is φ = 105060606010604.

The previous prime is 210121212021187. The next prime is 210121212021223. The reversal of 210121212021212 is 212120212121012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26265151502648 + ... + 26265151502655.

It is an arithmetic number, because the mean of its divisors is an integer number (61285353506188).

Almost surely, 2^{210121212021212} is an apocalyptic number.

It is an amenable number.

210121212021212 is a deficient number, since it is larger than the sum of its proper divisors (157590909015916).

210121212021212 is a wasteful number, since it uses less digits than its factorization.

210121212021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52530303005307 (or 52530303005305 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 210121212021212 its reverse (212120212121012), we get a palindrome (422241424142224).

The spelling of 210121212021212 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred twelve million, twenty-one thousand, two hundred twelve".