21122104454 has 32 divisors (see below), whose sum is σ = 34889944320. Its totient is φ = 9510573600.

The previous prime is 21122104453. The next prime is 21122104477. The reversal of 21122104454 is 45440122112.

It is a super-2 number, since 2×21122104454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122104453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1402247 + ... + 1417229.

It is an arithmetic number, because the mean of its divisors is an integer number (1090310760).

Almost surely, 2^21122104454 is an apocalyptic number.

21122104454 is a deficient number, since it is larger than the sum of its proper divisors (13767839866).

21122104454 is a wasteful number, since it uses less digits than its factorization.

21122104454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15596.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 21122104454 its reverse (45440122112), we get a palindrome (66562226566).

The spelling of 21122104454 in words is "twenty-one billion, one hundred twenty-two million, one hundred four thousand, four hundred fifty-four".