202121412212 has 12 divisors (see below), whose sum is σ = 374519087460. Its totient is φ = 95115958656.

The previous prime is 202121412193. The next prime is 202121412217. The reversal of 202121412212 is 212214121202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 86986064356 + 115135347856 = 294934^2 + 339316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121412217) 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, 1486186787 + ... + 1486186922.

It is an arithmetic number, because the mean of its divisors is an integer number (31209923955).

Almost surely, 2^202121412212 is an apocalyptic number.

It is an amenable number.

202121412212 is a deficient number, since it is larger than the sum of its proper divisors (172397675248).

202121412212 is a wasteful number, since it uses less digits than its factorization.

202121412212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972373730 (or 2972373728 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 202121412212 its reverse (212214121202), we get a palindrome (414335533414).

The spelling of 202121412212 in words is "two hundred two billion, one hundred twenty-one million, four hundred twelve thousand, two hundred twelve".