21233020220123 has 16 divisors (see below), whose sum is σ = 23249674635264. Its totient is φ = 19304017649280.

The previous prime is 21233020220119. The next prime is 21233020220143. The reversal of 21233020220123 is 32102202033212.

It is a cyclic number.

It is not a de Polignac number, because 21233020220123 - 2² = 21233020220119 is a prime.

It is a super-2 number, since 2×21233020220123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233020220143) 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, 36540215 + ... + 37116752.

It is an arithmetic number, because the mean of its divisors is an integer number (1453104664704).

Almost surely, 2^{21233020220123} is an apocalyptic number.

21233020220123 is a deficient number, since it is larger than the sum of its proper divisors (2016654415141).

21233020220123 is a wasteful number, since it uses less digits than its factorization.

21233020220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73657562.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21233020220123 its reverse (32102202033212), we get a palindrome (53335222253335).

The spelling of 21233020220123 in words is "twenty-one trillion, two hundred thirty-three billion, twenty million, two hundred twenty thousand, one hundred twenty-three".