212131700670 has 32 divisors (see below), whose sum is σ = 526671810720. Its totient is φ = 54617816960.

The previous prime is 212131700663. The next prime is 212131700681. The reversal of 212131700670 is 76007131212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121913901 + ... + 121915640.

It is an arithmetic number, because the mean of its divisors is an integer number (16458494085).

Almost surely, 2^212131700670 is an apocalyptic number.

212131700670 is an abundant number, since it is smaller than the sum of its proper divisors (314540110050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212131700670 is a wasteful number, since it uses less digits than its factorization.

212131700670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243829580.

The product of its (nonzero) digits is 3528, while the sum is 30.

Adding to 212131700670 its reverse (76007131212), we get a palindrome (288138831882).

The spelling of 212131700670 in words is "two hundred twelve billion, one hundred thirty-one million, seven hundred thousand, six hundred seventy".