212771131 has 2 divisors, whose sum is σ = 212771132. Its totient is φ = 212771130.

The previous prime is 212771123. The next prime is 212771147. The reversal of 212771131 is 131177212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212771131 - 2³ = 212771123 is a prime.

It is a super-2 number, since 2×212771131² = 90543108374038322, which contains 22 as substring.

It is equal to p_11746024 and since 212771131 and 11746024 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 212771096 and 212771105.

It is not a weakly prime, because it can be changed into another prime (212771171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106385565 + 106385566.

It is an arithmetic number, because the mean of its divisors is an integer number (106385566).

Almost surely, 2^212771131 is an apocalyptic number.

212771131 is a deficient number, since it is larger than the sum of its proper divisors (1).

212771131 is an equidigital number, since it uses as much as digits as its factorization.

212771131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588, while the sum is 25.

The square root of 212771131 is about 14586.6764891801. The cubic root of 212771131 is about 596.9952844066.

The spelling of 212771131 in words is "two hundred twelve million, seven hundred seventy-one thousand, one hundred thirty-one".