212061131 has 4 divisors (see below), whose sum is σ = 214966152. Its totient is φ = 209156112.

The previous prime is 212061103. The next prime is 212061149. The reversal of 212061131 is 131160212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212061131 - 2¹⁸ = 211798987 is a prime.

It is a super-2 number, since 2×212061131² = 89939846561998322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212061331) 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, 1452401 + ... + 1452546.

It is an arithmetic number, because the mean of its divisors is an integer number (53741538).

Almost surely, 2^212061131 is an apocalyptic number.

212061131 is a deficient number, since it is larger than the sum of its proper divisors (2905021).

212061131 is an equidigital number, since it uses as much as digits as its factorization.

212061131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905020.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 212061131 is about 14562.3188744101. The cubic root of 212061131 is about 596.3305028085.

The spelling of 212061131 in words is "two hundred twelve million, sixty-one thousand, one hundred thirty-one".