212201881 has 2 divisors, whose sum is σ = 212201882. Its totient is φ = 212201880.

The previous prime is 212201827. The next prime is 212201893. The reversal of 212201881 is 188102212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187251856 + 24950025 = 13684^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 212201881 - 2⁷ = 212201753 is a prime.

It is a super-2 number, since 2×212201881² = 90059276599876322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212208881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100940 + 106100941.

It is an arithmetic number, because the mean of its divisors is an integer number (106100941).

Almost surely, 2^212201881 is an apocalyptic number.

It is an amenable number.

212201881 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201881 is an equidigital number, since it uses as much as digits as its factorization.

212201881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 212201881 is about 14567.1507509190. The cubic root of 212201881 is about 596.4624065276.

The spelling of 212201881 in words is "two hundred twelve million, two hundred one thousand, eight hundred eighty-one".