20221212031 has 4 divisors (see below), whose sum is σ = 20221551952. Its totient is φ = 20220872112.

The previous prime is 20221212001. The next prime is 20221212073. The reversal of 20221212031 is 13021212202.

It is a happy number.

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 20221212031 - 2⁵ = 20221211999 is a prime.

It is a super-2 number, since 2×20221212031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20221211996 and 20221212014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221212001) 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, 54651 + ... + 208396.

It is an arithmetic number, because the mean of its divisors is an integer number (5055387988).

Almost surely, 2^20221212031 is an apocalyptic number.

20221212031 is a deficient number, since it is larger than the sum of its proper divisors (339921).

20221212031 is an equidigital number, since it uses as much as digits as its factorization.

20221212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339920.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20221212031 its reverse (13021212202), we get a palindrome (33242424233).

The spelling of 20221212031 in words is "twenty billion, two hundred twenty-one million, two hundred twelve thousand, thirty-one".