212021111131 has 8 divisors (see below), whose sum is σ = 223842379280. Its totient is φ = 200266069248.

The previous prime is 212021111123. The next prime is 212021111149. The reversal of 212021111131 is 131111120212.

It is a happy number.

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 212021111131 - 2³ = 212021111123 is a prime.

It is a super-2 number, since 2×212021111131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021111161) 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, 16549986 + ... + 16562791.

It is an arithmetic number, because the mean of its divisors is an integer number (27980297410).

Almost surely, 2^212021111131 is an apocalyptic number.

212021111131 is a deficient number, since it is larger than the sum of its proper divisors (11821268149).

212021111131 is a wasteful number, since it uses less digits than its factorization.

212021111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33113133.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 212021111131 its reverse (131111120212), we get a palindrome (343132231343).

The spelling of 212021111131 in words is "two hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred thirty-one".