212169131 has 2 divisors, whose sum is σ = 212169132. Its totient is φ = 212169130.

The previous prime is 212169109. The next prime is 212169161. The reversal of 212169131 is 131961212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212169131 - 2¹⁰ = 212168107 is a prime.

It is a super-2 number, since 2×212169131² = 90031480298590322, which contains 22 as substring.

It is equal to p_11714633 and since 212169131 and 11714633 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212169131.

It is not a weakly prime, because it can be changed into another prime (212169161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106084565 + 106084566.

It is an arithmetic number, because the mean of its divisors is an integer number (106084566).

Almost surely, 2^212169131 is an apocalyptic number.

212169131 is a deficient number, since it is larger than the sum of its proper divisors (1).

212169131 is an equidigital number, since it uses as much as digits as its factorization.

212169131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The square root of 212169131 is about 14566.0266030239. The cubic root of 212169131 is about 596.4317201065.

The spelling of 212169131 in words is "two hundred twelve million, one hundred sixty-nine thousand, one hundred thirty-one".