2121131311093 has 4 divisors (see below), whose sum is σ = 2122689821868. Its totient is φ = 2119572800320.

The previous prime is 2121131311043. The next prime is 2121131311097. The reversal of 2121131311093 is 3901131311212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1201080099844 + 920051211249 = 1095938^2 + 959193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121131311093 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 (2121131311097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779253346 + ... + 779256067.

It is an arithmetic number, because the mean of its divisors is an integer number (530672455467).

Almost surely, 2^{2121131311093} is an apocalyptic number.

It is an amenable number.

2121131311093 is a deficient number, since it is larger than the sum of its proper divisors (1558510775).

2121131311093 is a wasteful number, since it uses less digits than its factorization.

2121131311093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558510774.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 2121131311093 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-one million, three hundred eleven thousand, ninety-three".