2021000111021 has 8 divisors (see below), whose sum is σ = 2062315065888. Its totient is φ = 1979949150000.

The previous prime is 2021000110999. The next prime is 2021000111023. The reversal of 2021000111021 is 1201110001202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021000111021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021000110993 and 2021000111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021000111023) 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, 65982995 + ... + 66013616.

It is an arithmetic number, because the mean of its divisors is an integer number (257789383236).

Almost surely, 2^{2021000111021} is an apocalyptic number.

It is an amenable number.

2021000111021 is a deficient number, since it is larger than the sum of its proper divisors (41314954867).

2021000111021 is a wasteful number, since it uses less digits than its factorization.

2021000111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131996923.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2021000111021 its reverse (1201110001202), we get a palindrome (3222110112223).

The spelling of 2021000111021 in words is "two trillion, twenty-one billion, one hundred eleven thousand, twenty-one".