211870838122 has 4 divisors (see below), whose sum is σ = 317806257186. Its totient is φ = 105935419060.

The previous prime is 211870838089. The next prime is 211870838129. The reversal of 211870838122 is 221838078112.

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., 168232045921 + 43638792201 = 410161^2 + 208899^2 .

It is not an unprimeable number, because it can be changed into a prime (211870838129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52967709529 + ... + 52967709532.

Almost surely, 2^211870838122 is an apocalyptic number.

211870838122 is a deficient number, since it is larger than the sum of its proper divisors (105935419064).

211870838122 is a wasteful number, since it uses less digits than its factorization.

211870838122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105935419063.

The product of its (nonzero) digits is 86016, while the sum is 43.

The spelling of 211870838122 in words is "two hundred eleven billion, eight hundred seventy million, eight hundred thirty-eight thousand, one hundred twenty-two".