2000021120021 has 4 divisors (see below), whose sum is σ = 2000024201472. Its totient is φ = 2000018038572.

The previous prime is 2000021120003. The next prime is 2000021120047. The reversal of 2000021120021 is 1200211200002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000021120021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2000021119984 and 2000021120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000021620021) 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, 146741 + ... + 2005386.

It is an arithmetic number, because the mean of its divisors is an integer number (500006050368).

Almost surely, 2^{2000021120021} is an apocalyptic number.

It is an amenable number.

2000021120021 is a deficient number, since it is larger than the sum of its proper divisors (3081451).

2000021120021 is an equidigital number, since it uses as much as digits as its factorization.

2000021120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081450.

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

Adding to 2000021120021 its reverse (1200211200002), we get a palindrome (3200232320023).

The spelling of 2000021120021 in words is "two trillion, twenty-one million, one hundred twenty thousand, twenty-one".