2121020202313 has 4 divisors (see below), whose sum is σ = 2232652844560. Its totient is φ = 2009387560068.

The previous prime is 2121020202311. The next prime is 2121020202359. The reversal of 2121020202313 is 3132020201212.

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 a cyclic number.

It is not a de Polignac number, because 2121020202313 - 2¹ = 2121020202311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 111632642227 = 2121020202313 / (2 + 1 + 2 + 1 + 0 + 2 + 0 + 2 + 0 + 2 + 3 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121020202311) 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, 55816321095 + ... + 55816321132.

It is an arithmetic number, because the mean of its divisors is an integer number (558163211140).

Almost surely, 2^{2121020202313} is an apocalyptic number.

It is an amenable number.

2121020202313 is a deficient number, since it is larger than the sum of its proper divisors (111632642247).

2121020202313 is a wasteful number, since it uses less digits than its factorization.

2121020202313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111632642246.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2121020202313 its reverse (3132020201212), we get a palindrome (5253040403525).

The spelling of 2121020202313 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred two thousand, three hundred thirteen".