2021002111001 has 4 divisors (see below), whose sum is σ = 2022418371792. Its totient is φ = 2019585850212.

The previous prime is 2021002110961. The next prime is 2021002111031. The reversal of 2021002111001 is 1001112001202.

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 2021002111001 - 2¹⁰ = 2021002109977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021002111031) 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, 708128255 + ... + 708131108.

It is an arithmetic number, because the mean of its divisors is an integer number (505604592948).

Almost surely, 2^{2021002111001} is an apocalyptic number.

It is an amenable number.

2021002111001 is a deficient number, since it is larger than the sum of its proper divisors (1416260791).

2021002111001 is a wasteful number, since it uses less digits than its factorization.

2021002111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416260790.

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

Adding to 2021002111001 its reverse (1001112001202), we get a palindrome (3022114112203).

The spelling of 2021002111001 in words is "two trillion, twenty-one billion, two million, one hundred eleven thousand, one".