212021131 has 8 divisors (see below), whose sum is σ = 242917344. Its totient is φ = 181276800.

The previous prime is 212021113. The next prime is 212021141. The reversal of 212021131 is 131120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212021131 - 2⁵ = 212021099 is a prime.

It is a super-2 number, since 2×212021131² = 89905919981038322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34960 + ... + 40573.

It is an arithmetic number, because the mean of its divisors is an integer number (30364668).

Almost surely, 2^212021131 is an apocalyptic number.

212021131 is a deficient number, since it is larger than the sum of its proper divisors (30896213).

212021131 is an equidigital number, since it uses as much as digits as its factorization.

212021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75941.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 212021131 is about 14560.9454019991. The cubic root of 212021131 is about 596.2930061994.

Adding to 212021131 its reverse (131120212), we get a palindrome (343141343).

The spelling of 212021131 in words is "two hundred twelve million, twenty-one thousand, one hundred thirty-one".