20023121233 has 2 divisors, whose sum is σ = 20023121234. Its totient is φ = 20023121232.

The previous prime is 20023121231. The next prime is 20023121257. The reversal of 20023121233 is 33212132002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19979257104 + 43864129 = 141348^2 + 6623^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023121233 - 2¹ = 20023121231 is a prime.

It is a super-3 number, since 3×20023121233³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 20023121231, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20023121233.

It is not a weakly prime, because it can be changed into another prime (20023121231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011560616 + 10011560617.

It is an arithmetic number, because the mean of its divisors is an integer number (10011560617).

Almost surely, 2^20023121233 is an apocalyptic number.

It is an amenable number.

20023121233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023121233 is an equidigital number, since it uses as much as digits as its factorization.

20023121233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20023121233 its reverse (33212132002), we get a palindrome (53235253235).

The spelling of 20023121233 in words is "twenty billion, twenty-three million, one hundred twenty-one thousand, two hundred thirty-three".