2102020223021 has 8 divisors (see below), whose sum is σ = 2232272835000. Its totient is φ = 1972501429248.

The previous prime is 2102020223011. The next prime is 2102020223029. The reversal of 2102020223021 is 1203220202012.

It can be written as a sum of positive squares in 4 ways, for example, as 23480965225 + 2078539257796 = 153235^2 + 1441714^2 .

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 2102020223021 - 2¹⁸ = 2102019960877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102020223029) 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, 183448646 + ... + 183460103.

It is an arithmetic number, because the mean of its divisors is an integer number (279034104375).

Almost surely, 2^{2102020223021} is an apocalyptic number.

It is an amenable number.

2102020223021 is a deficient number, since it is larger than the sum of its proper divisors (130252611979).

2102020223021 is a wasteful number, since it uses less digits than its factorization.

2102020223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366909103.

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

Adding to 2102020223021 its reverse (1203220202012), we get a palindrome (3305240425033).

The spelling of 2102020223021 in words is "two trillion, one hundred two billion, twenty million, two hundred twenty-three thousand, twenty-one".