212122100031 has 32 divisors (see below), whose sum is σ = 289928782080. Its totient is φ = 137909181696.

The previous prime is 212122099963. The next prime is 212122100039. The reversal of 212122100031 is 130001221212.

It is not a de Polignac number, because 212122100031 - 2¹¹ = 212122097983 is a prime.

It is a super-2 number, since 2×212122100031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122100039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48108955 + ... + 48113363.

It is an arithmetic number, because the mean of its divisors is an integer number (9060274440).

Almost surely, 2^212122100031 is an apocalyptic number.

212122100031 is a deficient number, since it is larger than the sum of its proper divisors (77806682049).

212122100031 is a wasteful number, since it uses less digits than its factorization.

212122100031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6823.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212122100031 its reverse (130001221212), we get a palindrome (342123321243).

The spelling of 212122100031 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred thousand, thirty-one".