2021111022101 has 8 divisors (see below), whose sum is σ = 2140013516760. Its totient is φ = 1902210039808.

The previous prime is 2021111022097. The next prime is 2021111022107. The reversal of 2021111022101 is 1012201111202.

It can be written as a sum of positive squares in 4 ways, for example, as 997999002001 + 1023112020100 = 998999^2 + 1011490^2 .

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

It is not a de Polignac number, because 2021111022101 - 2² = 2021111022097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111022107) 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, 3524015 + ... + 4057203.

It is an arithmetic number, because the mean of its divisors is an integer number (267501689595).

Almost surely, 2^{2021111022101} is an apocalyptic number.

It is an amenable number.

2021111022101 is a deficient number, since it is larger than the sum of its proper divisors (118902494659).

2021111022101 is a wasteful number, since it uses less digits than its factorization.

2021111022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756183.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021111022101 its reverse (1012201111202), we get a palindrome (3033312133303).

The spelling of 2021111022101 in words is "two trillion, twenty-one billion, one hundred eleven million, twenty-two thousand, one hundred one".