22121101031 has 4 divisors (see below), whose sum is σ = 22148445600. Its totient is φ = 22093756464.

The previous prime is 22121101027. The next prime is 22121101039. The reversal of 22121101031 is 13010112122.

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 22121101031 - 2² = 22121101027 is a prime.

It is a super-2 number, since 2×22121101031² (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 = 22121100997 and 22121101015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121101039) 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, 13671071 + ... + 13672688.

It is an arithmetic number, because the mean of its divisors is an integer number (5537111400).

Almost surely, 2^22121101031 is an apocalyptic number.

22121101031 is a deficient number, since it is larger than the sum of its proper divisors (27344569).

22121101031 is an equidigital number, since it uses as much as digits as its factorization.

22121101031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27344568.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 22121101031 its reverse (13010112122), we get a palindrome (35131213153).

The spelling of 22121101031 in words is "twenty-two billion, one hundred twenty-one million, one hundred one thousand, thirty-one".