20211222031 has 24 divisors (see below), whose sum is σ = 27621339984. Its totient is φ = 14537537280.

The previous prime is 20211221999. The next prime is 20211222037. The reversal of 20211222031 is 13022211202.

It is a happy number.

It is not a de Polignac number, because 20211222031 - 2⁵ = 20211221999 is a prime.

It is a super-2 number, since 2×20211222031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211221996 and 20211222014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211222037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1435210 + ... + 1449223.

It is an arithmetic number, because the mean of its divisors is an integer number (1150889166).

Almost surely, 2^20211222031 is an apocalyptic number.

20211222031 is a deficient number, since it is larger than the sum of its proper divisors (7410117953).

20211222031 is a wasteful number, since it uses less digits than its factorization.

20211222031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884471 (or 2884464 counting only the distinct ones).

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

Adding to 20211222031 its reverse (13022211202), we get a palindrome (33233433233).

It can be divided in two parts, 20211 and 222031, that added together give a palindrome (242242).

The spelling of 20211222031 in words is "twenty billion, two hundred eleven million, two hundred twenty-two thousand, thirty-one".