22031122021 has 8 divisors (see below), whose sum is σ = 22256832888. Its totient is φ = 21805560000.

The previous prime is 22031121997. The next prime is 22031122049. The reversal of 22031122021 is 12022113022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14662788100 + 7368333921 = 121090^2 + 85839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22031122021 - 2²¹ = 22029024869 is a prime.

It is a super-2 number, since 2×22031122021² (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 = 22031121986 and 22031122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031122621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273531 + ... + 344791.

It is an arithmetic number, because the mean of its divisors is an integer number (2782104111).

Almost surely, 2^22031122021 is an apocalyptic number.

It is an amenable number.

22031122021 is a deficient number, since it is larger than the sum of its proper divisors (225710867).

22031122021 is a wasteful number, since it uses less digits than its factorization.

22031122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74423.

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

Adding to 22031122021 its reverse (12022113022), we get a palindrome (34053235043).

The spelling of 22031122021 in words is "twenty-two billion, thirty-one million, one hundred twenty-two thousand, twenty-one".