2021200111021 has 8 divisors (see below), whose sum is σ = 2487630905984. Its totient is φ = 1599191296560.

The previous prime is 2021200110953. The next prime is 2021200111033. The reversal of 2021200111021 is 1201110021202.

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

It is not a de Polignac number, because 2021200111021 - 2¹¹ = 2021200108973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 2021200110992 and 2021200111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021200112021) 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, 11105495025 + ... + 11105495206.

It is an arithmetic number, because the mean of its divisors is an integer number (310953863248).

Almost surely, 2^{2021200111021} is an apocalyptic number.

It is an amenable number.

2021200111021 is a deficient number, since it is larger than the sum of its proper divisors (466430794963).

2021200111021 is a wasteful number, since it uses less digits than its factorization.

2021200111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22210990251.

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

Adding to 2021200111021 its reverse (1201110021202), we get a palindrome (3222310132223).

The spelling of 2021200111021 in words is "two trillion, twenty-one billion, two hundred million, one hundred eleven thousand, twenty-one".