2131321122101 has 2 divisors, whose sum is σ = 2131321122102. Its totient is φ = 2131321122100.

The previous prime is 2131321122097. The next prime is 2131321122103. The reversal of 2131321122101 is 1012211231312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1604642895025 + 526678227076 = 1266745^2 + 725726^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131321122101 - 2² = 2131321122097 is a prime.

Together with 2131321122103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131321122103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065660561050 + 1065660561051.

It is an arithmetic number, because the mean of its divisors is an integer number (1065660561051).

Almost surely, 2^{2131321122101} is an apocalyptic number.

It is an amenable number.

2131321122101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131321122101 is an equidigital number, since it uses as much as digits as its factorization.

2131321122101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2131321122101 its reverse (1012211231312), we get a palindrome (3143532353413).

The spelling of 2131321122101 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, one hundred one".