21233333012131 has 4 divisors (see below), whose sum is σ = 21238566768472. Its totient is φ = 21228099255792.

The previous prime is 21233333012083. The next prime is 21233333012137. The reversal of 21233333012131 is 13121033333212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21233333012131 - 2⁹ = 21233333011619 is a prime.

It is a super-2 number, since 2×21233333012131² (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 21233333012131.

It is not an unprimeable number, because it can be changed into a prime (21233333012137) 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, 2616872085 + ... + 2616880198.

It is an arithmetic number, because the mean of its divisors is an integer number (5309641692118).

Almost surely, 2^{21233333012131} is an apocalyptic number.

21233333012131 is a deficient number, since it is larger than the sum of its proper divisors (5233756341).

21233333012131 is an equidigital number, since it uses as much as digits as its factorization.

21233333012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233756340.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21233333012131 its reverse (13121033333212), we get a palindrome (34354366345343).

The spelling of 21233333012131 in words is "twenty-one trillion, two hundred thirty-three billion, three hundred thirty-three million, twelve thousand, one hundred thirty-one".