202121001312 has 48 divisors (see below), whose sum is σ = 534440419632. Its totient is φ = 66881884160.

The previous prime is 202121001301. The next prime is 202121001319. The reversal of 202121001312 is 213100121202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 202121001291 and 202121001300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121001319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7670889 + ... + 7697192.

It is an arithmetic number, because the mean of its divisors is an integer number (11134175409).

Almost surely, 2^202121001312 is an apocalyptic number.

It is an amenable number.

202121001312 is an abundant number, since it is smaller than the sum of its proper divisors (332319418320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202121001312 is a wasteful number, since it uses less digits than its factorization.

202121001312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15368231 (or 15368223 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 202121001312 its reverse (213100121202), we get a palindrome (415221122514).

The spelling of 202121001312 in words is "two hundred two billion, one hundred twenty-one million, one thousand, three hundred twelve".