21022101121123 has 16 divisors (see below), whose sum is σ = 21639240972160. Its totient is φ = 20413801699200.

The previous prime is 21022101121103. The next prime is 21022101121127. The reversal of 21022101121123 is 32112110122012.

It is a cyclic number.

It is not a de Polignac number, because 21022101121123 - 2¹³ = 21022101112931 is a prime.

It is a super-2 number, since 2×21022101121123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022101121123.

It is not an unprimeable number, because it can be changed into a prime (21022101121127) 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, 52022233 + ... + 52424773.

It is an arithmetic number, because the mean of its divisors is an integer number (1352452560760).

Almost surely, 2^{21022101121123} is an apocalyptic number.

21022101121123 is a deficient number, since it is larger than the sum of its proper divisors (617139851037).

21022101121123 is a wasteful number, since it uses less digits than its factorization.

21022101121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413518.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21022101121123 its reverse (32112110122012), we get a palindrome (53134211243135).

The spelling of 21022101121123 in words is "twenty-one trillion, twenty-two billion, one hundred one million, one hundred twenty-one thousand, one hundred twenty-three".