212202002138 has 32 divisors (see below), whose sum is σ = 401920061184. Its totient is φ = 81872600832.

The previous prime is 212202002137. The next prime is 212202002191. The reversal of 212202002138 is 831200202212.

212202002138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212202002138² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (212202002137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19377245 + ... + 19388192.

It is an arithmetic number, because the mean of its divisors is an integer number (12560001912).

Almost surely, 2^212202002138 is an apocalyptic number.

212202002138 is a deficient number, since it is larger than the sum of its proper divisors (189718059046).

212202002138 is a wasteful number, since it uses less digits than its factorization.

212202002138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38765486.

The product of its (nonzero) digits is 768, while the sum is 23.

The spelling of 212202002138 in words is "two hundred twelve billion, two hundred two million, two thousand, one hundred thirty-eight".