2120012110021 has 8 divisors (see below), whose sum is σ = 2283102793440. Its totient is φ = 1956923259312.

The previous prime is 2120012110001. The next prime is 2120012110039. The reversal of 2120012110021 is 1200112100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2120012110021 - 2⁷ = 2120012109893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120012109983 and 2120012110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120012110001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2805306 + ... + 3479908.

It is an arithmetic number, because the mean of its divisors is an integer number (285387849180).

Almost surely, 2^{2120012110021} is an apocalyptic number.

It is an amenable number.

2120012110021 is a deficient number, since it is larger than the sum of its proper divisors (163090683419).

2120012110021 is a wasteful number, since it uses less digits than its factorization.

2120012110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916355.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2120012110021 its reverse (1200112100212), we get a palindrome (3320124210233).

The spelling of 2120012110021 in words is "two trillion, one hundred twenty billion, twelve million, one hundred ten thousand, twenty-one".