212201891138 has 8 divisors (see below), whose sum is σ = 325075237632. Its totient is φ = 103843478596.

The previous prime is 212201891137. The next prime is 212201891149. The reversal of 212201891138 is 831198102212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (212201891137) 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, 1128733370 + ... + 1128733557.

It is an arithmetic number, because the mean of its divisors is an integer number (40634404704).

Almost surely, 2^212201891138 is an apocalyptic number.

212201891138 is a deficient number, since it is larger than the sum of its proper divisors (112873346494).

212201891138 is a wasteful number, since it uses less digits than its factorization.

212201891138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257466976.

The product of its (nonzero) digits is 13824, while the sum is 38.

The spelling of 212201891138 in words is "two hundred twelve billion, two hundred one million, eight hundred ninety-one thousand, one hundred thirty-eight".