2000102120021 has 4 divisors (see below), whose sum is σ = 2000141068044. Its totient is φ = 2000063172000.

The previous prime is 2000102119991. The next prime is 2000102120077. The reversal of 2000102120021 is 1200212010002.

It is a happy number.

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 533002204900 + 1467099915121 = 730070^2 + 1211239^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000102120021 - 2¹⁸ = 2000101857877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2000102119984 and 2000102120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000102126021) 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, 19396880 + ... + 19499721.

It is an arithmetic number, because the mean of its divisors is an integer number (500035267011).

Almost surely, 2^{2000102120021} is an apocalyptic number.

It is an amenable number.

2000102120021 is a deficient number, since it is larger than the sum of its proper divisors (38948023).

2000102120021 is an equidigital number, since it uses as much as digits as its factorization.

2000102120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38948022.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2000102120021 its reverse (1200212010002), we get a palindrome (3200314130023).

The spelling of 2000102120021 in words is "two trillion, one hundred two million, one hundred twenty thousand, twenty-one".