21112427122 has 16 divisors (see below), whose sum is σ = 33059057472. Its totient is φ = 10093116880.

The previous prime is 21112427101. The next prime is 21112427129. The reversal of 21112427122 is 22172421112.

It is a super-2 number, since 2×21112427122² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112427129) 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, 21297 + ... + 206587.

It is an arithmetic number, because the mean of its divisors is an integer number (2066191092).

Almost surely, 2^21112427122 is an apocalyptic number.

21112427122 is a deficient number, since it is larger than the sum of its proper divisors (11946630350).

21112427122 is a wasteful number, since it uses less digits than its factorization.

21112427122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187793.

The product of its digits is 896, while the sum is 25.

Adding to 21112427122 its reverse (22172421112), we get a palindrome (43284848234).

The spelling of 21112427122 in words is "twenty-one billion, one hundred twelve million, four hundred twenty-seven thousand, one hundred twenty-two".