212206131 has 12 divisors (see below), whose sum is σ = 307897408. Its totient is φ = 140835024.

The previous prime is 212206123. The next prime is 212206133. The reversal of 212206131 is 131602212.

It is not a de Polignac number, because 212206131 - 2³ = 212206123 is a prime.

It is a super-2 number, since 2×212206131² = 90062884067978322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212206133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50860 + ... + 54873.

Almost surely, 2^212206131 is an apocalyptic number.

212206131 is a deficient number, since it is larger than the sum of its proper divisors (95691277).

212206131 is a wasteful number, since it uses less digits than its factorization.

212206131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105962 (or 105959 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 212206131 is about 14567.2966263477. The cubic root of 212206131 is about 596.4663885035.

Adding to 212206131 its reverse (131602212), we get a palindrome (343808343).

The spelling of 212206131 in words is "two hundred twelve million, two hundred six thousand, one hundred thirty-one".