211102222138 has 4 divisors (see below), whose sum is σ = 316653333210. Its totient is φ = 105551111068.

The previous prime is 211102222027. The next prime is 211102222139. The reversal of 211102222138 is 831222201112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 195670868409 + 15431353729 = 442347^2 + 124223^2 .

It is not an unprimeable number, because it can be changed into a prime (211102222139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52775555533 + ... + 52775555536.

Almost surely, 2^211102222138 is an apocalyptic number.

211102222138 is a deficient number, since it is larger than the sum of its proper divisors (105551111072).

211102222138 is a wasteful number, since it uses less digits than its factorization.

211102222138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105551111071.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 211102222138 in words is "two hundred eleven billion, one hundred two million, two hundred twenty-two thousand, one hundred thirty-eight".