2111020021021 has 4 divisors (see below), whose sum is σ = 2117397725344. Its totient is φ = 2104642316700.

The previous prime is 2111020021001. The next prime is 2111020021067. The reversal of 2111020021021 is 1201200201112.

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 not a de Polignac number, because 2111020021021 - 2²⁹ = 2110483150109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111020020992 and 2111020021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111020021001) 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, 3188851665 + ... + 3188852326.

It is an arithmetic number, because the mean of its divisors is an integer number (529349431336).

Almost surely, 2^{2111020021021} is an apocalyptic number.

It is an amenable number.

2111020021021 is a deficient number, since it is larger than the sum of its proper divisors (6377704323).

2111020021021 is an equidigital number, since it uses as much as digits as its factorization.

2111020021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6377704322.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2111020021021 its reverse (1201200201112), we get a palindrome (3312220222133).

The spelling of 2111020021021 in words is "two trillion, one hundred eleven billion, twenty million, twenty-one thousand, twenty-one".