2131220333101 has 4 divisors (see below), whose sum is σ = 2163029591872. Its totient is φ = 2099411074332.

The previous prime is 2131220333083. The next prime is 2131220333119. The reversal of 2131220333101 is 1013330221312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2131220333083) and next prime (2131220333119).

It is a cyclic number.

It is not a de Polignac number, because 2131220333101 - 2⁵ = 2131220333069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131220333171) 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, 15904629285 + ... + 15904629418.

It is an arithmetic number, because the mean of its divisors is an integer number (540757397968).

Almost surely, 2^{2131220333101} is an apocalyptic number.

It is an amenable number.

2131220333101 is a deficient number, since it is larger than the sum of its proper divisors (31809258771).

2131220333101 is an equidigital number, since it uses as much as digits as its factorization.

2131220333101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31809258770.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2131220333101 its reverse (1013330221312), we get a palindrome (3144550554413).

The spelling of 2131220333101 in words is "two trillion, one hundred thirty-one billion, two hundred twenty million, three hundred thirty-three thousand, one hundred one".