212021131431 has 8 divisors (see below), whose sum is σ = 282844502640. Its totient is φ = 141272590592.

The previous prime is 212021131411. The next prime is 212021131451. The reversal of 212021131431 is 134131120212.

It is an interprime number because it is at equal distance from previous prime (212021131411) and next prime (212021131451).

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 212021131431 - 2⁷ = 212021131303 is a prime.

It is a super-2 number, since 2×212021131431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212021131398 and 212021131407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021131411) 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, 18700980 + ... + 18712313.

It is an arithmetic number, because the mean of its divisors is an integer number (35355562830).

Almost surely, 2^212021131431 is an apocalyptic number.

212021131431 is a deficient number, since it is larger than the sum of its proper divisors (70823371209).

212021131431 is a wasteful number, since it uses less digits than its factorization.

212021131431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37415185.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 212021131431 its reverse (134131120212), we get a palindrome (346152251643).

The spelling of 212021131431 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-one thousand, four hundred thirty-one".