21112022122 has 16 divisors (see below), whose sum is σ = 32106098952. Its totient is φ = 10410803200.

The previous prime is 21112022111. The next prime is 21112022123. The reversal of 21112022122 is 22122021112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21080426481 + 31595641 = 145191^2 + 5621^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21112022096 and 21112022105.

It is not an unprimeable number, because it can be changed into a prime (21112022123) 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, 151423 + ... + 255250.

Almost surely, 2^21112022122 is an apocalyptic number.

21112022122 is a deficient number, since it is larger than the sum of its proper divisors (10994076830).

21112022122 is a wasteful number, since it uses less digits than its factorization.

21112022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407033.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21112022122 its reverse (22122021112), we get a palindrome (43234043234).

The spelling of 21112022122 in words is "twenty-one billion, one hundred twelve million, twenty-two thousand, one hundred twenty-two".