212120022255431 has 4 divisors (see below), whose sum is σ = 212120637464232. Its totient is φ = 212119407046632.

The previous prime is 212120022255419. The next prime is 212120022255433. The reversal of 212120022255431 is 134552220021212.

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 212120022255431 - 2⁶ = 212120022255367 is a prime.

It is a super-2 number, since 2×212120022255431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120022255433) 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, 307086920 + ... + 307776893.

It is an arithmetic number, because the mean of its divisors is an integer number (53030159366058).

Almost surely, 2^{212120022255431} is an apocalyptic number.

212120022255431 is a deficient number, since it is larger than the sum of its proper divisors (615208801).

212120022255431 is an equidigital number, since it uses as much as digits as its factorization.

212120022255431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615208800.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 212120022255431 its reverse (134552220021212), we get a palindrome (346672242276643).

The spelling of 212120022255431 in words is "two hundred twelve trillion, one hundred twenty billion, twenty-two million, two hundred fifty-five thousand, four hundred thirty-one".