2120312101 has 4 divisors (see below), whose sum is σ = 2132157600. Its totient is φ = 2108466604.

The previous prime is 2120312099. The next prime is 2120312123. The reversal of 2120312101 is 1012130212.

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 2120312101 - 2¹ = 2120312099 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 (2120312141) 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, 5922481 + ... + 5922838.

It is an arithmetic number, because the mean of its divisors is an integer number (533039400).

Almost surely, 2^2120312101 is an apocalyptic number.

It is an amenable number.

2120312101 is a deficient number, since it is larger than the sum of its proper divisors (11845499).

2120312101 is a wasteful number, since it uses less digits than its factorization.

2120312101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11845498.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2120312101 is about 46046.8468084406. The cubic root of 2120312101 is about 1284.6946946860.

Adding to 2120312101 its reverse (1012130212), we get a palindrome (3132442313).

The spelling of 2120312101 in words is "two billion, one hundred twenty million, three hundred twelve thousand, one hundred one".