2120021010021 has 8 divisors (see below), whose sum is σ = 2975468084320. Its totient is φ = 1338960637872.

The previous prime is 2120021010017. The next prime is 2120021010049. The reversal of 2120021010021 is 1200101200212.

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

It is not a de Polignac number, because 2120021010021 - 2² = 2120021010017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120021009979 and 2120021010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120021010061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18596675470 + ... + 18596675583.

It is an arithmetic number, because the mean of its divisors is an integer number (371933510540).

Almost surely, 2^{2120021010021} is an apocalyptic number.

It is an amenable number.

2120021010021 is a deficient number, since it is larger than the sum of its proper divisors (855447074299).

2120021010021 is a wasteful number, since it uses less digits than its factorization.

2120021010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37193351075.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2120021010021 its reverse (1200101200212), we get a palindrome (3320122210233).

The spelling of 2120021010021 in words is "two trillion, one hundred twenty billion, twenty-one million, ten thousand, twenty-one".