212121131221301 has 64 divisors (see below), whose sum is σ = 256515839262720. Its totient is φ = 173798723450880.

The previous prime is 212121131221283. The next prime is 212121131221327. The reversal of 212121131221301 is 103122131121212.

It is a de Polignac number, because none of the positive numbers 2^k-212121131221301 is a prime.

It is a super-2 number, since 2×212121131221301² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121131221361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28189400 + ... + 34912526.

It is an arithmetic number, because the mean of its divisors is an integer number (4008059988480).

Almost surely, 2^{212121131221301} is an apocalyptic number.

It is an amenable number.

212121131221301 is a deficient number, since it is larger than the sum of its proper divisors (44394708041419).

212121131221301 is a wasteful number, since it uses less digits than its factorization.

212121131221301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6723354.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 212121131221301 its reverse (103122131121212), we get a palindrome (315243262342513).

The spelling of 212121131221301 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, three hundred one".