202121211213 has 24 divisors (see below), whose sum is σ = 292601994048. Its totient is φ = 134448040512.

The previous prime is 202121211209. The next prime is 202121211217. The reversal of 202121211213 is 312112121202.

It is an interprime number because it is at equal distance from previous prime (202121211209) and next prime (202121211217).

It is not a de Polignac number, because 202121211213 - 2² = 202121211209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25493856 + ... + 25501782.

It is an arithmetic number, because the mean of its divisors is an integer number (12191749752).

Almost surely, 2^202121211213 is an apocalyptic number.

It is an amenable number.

202121211213 is a deficient number, since it is larger than the sum of its proper divisors (90480782835).

202121211213 is a wasteful number, since it uses less digits than its factorization.

202121211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13873 (or 13870 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 202121211213 its reverse (312112121202), we get a palindrome (514233332415).

The spelling of 202121211213 in words is "two hundred two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirteen".