20211222121123 has 24 divisors (see below), whose sum is σ = 22950070657920. Its totient is φ = 17767335062400.

The previous prime is 20211222121109. The next prime is 20211222121151. The reversal of 20211222121123 is 32112122211202.

It is not a de Polignac number, because 20211222121123 - 2¹⁷ = 20211221990051 is a prime.

It is a super-2 number, since 2×20211222121123² (a number of 27 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 = 20211222121094 and 20211222121103.

It is not an unprimeable number, because it can be changed into a prime (20211222121183) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2744961 + ... + 6925117.

It is an arithmetic number, because the mean of its divisors is an integer number (956252944080).

Almost surely, 2^{20211222121123} is an apocalyptic number.

20211222121123 is a deficient number, since it is larger than the sum of its proper divisors (2738848536797).

20211222121123 is a wasteful number, since it uses less digits than its factorization.

20211222121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181499 (or 4181488 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20211222121123 its reverse (32112122211202), we get a palindrome (52323344332325).

The spelling of 20211222121123 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-three".