2021010111101 has 4 divisors (see below), whose sum is σ = 2034573937500. Its totient is φ = 2007446284704.

The previous prime is 2021010111083. The next prime is 2021010111163. The reversal of 2021010111101 is 1011110101202.

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 334905264100 + 1686104847001 = 578710^2 + 1298501^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021010111101 - 2¹⁴ = 2021010094717 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 (2021010111401) 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, 6781912976 + ... + 6781913273.

It is an arithmetic number, because the mean of its divisors is an integer number (508643484375).

Almost surely, 2^{2021010111101} is an apocalyptic number.

It is an amenable number.

2021010111101 is a deficient number, since it is larger than the sum of its proper divisors (13563826399).

2021010111101 is a wasteful number, since it uses less digits than its factorization.

2021010111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563826398.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 2021010111101 its reverse (1011110101202), we get a palindrome (3032120212303).

The spelling of 2021010111101 in words is "two trillion, twenty-one billion, ten million, one hundred eleven thousand, one hundred one".