2120112021213 has 36 divisors (see below), whose sum is σ = 3215301385660. Its totient is φ = 1346051063808.

The previous prime is 2120112021187. The next prime is 2120112021221. The reversal of 2120112021213 is 3121202110212.

It can be written as a sum of positive squares in 2 ways, for example, as 1432011908889 + 688100112324 = 1196667^2 + 829518^2 .

It is not a de Polignac number, because 2120112021213 - 2⁶ = 2120112021149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120112028213) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117981 + ... + 2062557.

Almost surely, 2^{2120112021213} is an apocalyptic number.

2120112021213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2120112021213 is a deficient number, since it is larger than the sum of its proper divisors (1095189364447).

2120112021213 is a wasteful number, since it uses less digits than its factorization.

2120112021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944858 (or 1944832 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2120112021213 its reverse (3121202110212), we get a palindrome (5241314131425).

The spelling of 2120112021213 in words is "two trillion, one hundred twenty billion, one hundred twelve million, twenty-one thousand, two hundred thirteen".