20233202121311 has 4 divisors (see below), whose sum is σ = 21112906561392. Its totient is φ = 19353497681232.

The previous prime is 20233202121287. The next prime is 20233202121329. The reversal of 20233202121311 is 11312120233202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20233202121311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 879704440057 = 20233202121311 / (2 + 0 + 2 + 3 + 3 + 2 + 0 + 2 + 1 + 2 + 1 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233202121611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439852220006 + ... + 439852220051.

It is an arithmetic number, because the mean of its divisors is an integer number (5278226640348).

Almost surely, 2^{20233202121311} is an apocalyptic number.

20233202121311 is a deficient number, since it is larger than the sum of its proper divisors (879704440081).

20233202121311 is an equidigital number, since it uses as much as digits as its factorization.

20233202121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879704440080.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20233202121311 its reverse (11312120233202), we get a palindrome (31545322354513).

The spelling of 20233202121311 in words is "twenty trillion, two hundred thirty-three billion, two hundred two million, one hundred twenty-one thousand, three hundred eleven".