2120112102021 has 4 divisors (see below), whose sum is σ = 2826816136032. Its totient is φ = 1413408068012.

The previous prime is 2120112101981. The next prime is 2120112102037. The reversal of 2120112102021 is 1202012110212.

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 2120112102021 - 2¹⁵ = 2120112069253 is a prime.

It is a super-2 number, since 2×2120112102021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120112102821) 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, 353352017001 + ... + 353352017006.

It is an arithmetic number, because the mean of its divisors is an integer number (706704034008).

Almost surely, 2^{2120112102021} is an apocalyptic number.

It is an amenable number.

2120112102021 is a deficient number, since it is larger than the sum of its proper divisors (706704034011).

2120112102021 is an equidigital number, since it uses as much as digits as its factorization.

2120112102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706704034010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2120112102021 its reverse (1202012110212), we get a palindrome (3322124212233).

The spelling of 2120112102021 in words is "two trillion, one hundred twenty billion, one hundred twelve million, one hundred two thousand, twenty-one".