2021001012101 has 4 divisors (see below), whose sum is σ = 2039542305900. Its totient is φ = 2002459718304.

The previous prime is 2021001012097. The next prime is 2021001012167. The reversal of 2021001012101 is 1012101001202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 873852909601 + 1147148102500 = 934801^2 + 1071050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021001012101 - 2² = 2021001012097 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 (2021001012181) 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, 9270646736 + ... + 9270646953.

It is an arithmetic number, because the mean of its divisors is an integer number (509885576475).

Almost surely, 2^{2021001012101} is an apocalyptic number.

It is an amenable number.

2021001012101 is a deficient number, since it is larger than the sum of its proper divisors (18541293799).

2021001012101 is a wasteful number, since it uses less digits than its factorization.

2021001012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18541293798.

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

Adding to 2021001012101 its reverse (1012101001202), we get a palindrome (3033102013303).

The spelling of 2021001012101 in words is "two trillion, twenty-one billion, one million, twelve thousand, one hundred one".