2120302022021 has 4 divisors (see below), whose sum is σ = 2122526893932. Its totient is φ = 2118077150112.

The previous prime is 2120302021993. The next prime is 2120302022023. The reversal of 2120302022021 is 1202202030212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1703257297921 + 417044724100 = 1305089^2 + 645790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120302022021 - 2²² = 2120297827717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120302022023) 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, 1112434526 + ... + 1112436431.

It is an arithmetic number, because the mean of its divisors is an integer number (530631723483).

Almost surely, 2^{2120302022021} is an apocalyptic number.

It is an amenable number.

2120302022021 is a deficient number, since it is larger than the sum of its proper divisors (2224871911).

2120302022021 is an equidigital number, since it uses as much as digits as its factorization.

2120302022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224871910.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 2120302022021 its reverse (1202202030212), we get a palindrome (3322504052233).

The spelling of 2120302022021 in words is "two trillion, one hundred twenty billion, three hundred two million, twenty-two thousand, twenty-one".