20211312131203 has 4 divisors (see below), whose sum is σ = 20211574553128. Its totient is φ = 20211049709280.

The previous prime is 20211312131191. The next prime is 20211312131249. The reversal of 20211312131203 is 30213121311202.

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 20211312131203 - 2²¹ = 20211310034051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211312101203) 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, 131095401 + ... + 131249482.

It is an arithmetic number, because the mean of its divisors is an integer number (5052893638282).

Almost surely, 2^{20211312131203} is an apocalyptic number.

20211312131203 is a deficient number, since it is larger than the sum of its proper divisors (262421925).

20211312131203 is an equidigital number, since it uses as much as digits as its factorization.

20211312131203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262421924.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20211312131203 its reverse (30213121311202), we get a palindrome (50424433442405).

The spelling of 20211312131203 in words is "twenty trillion, two hundred eleven billion, three hundred twelve million, one hundred thirty-one thousand, two hundred three".