2111202021001 has 4 divisors (see below), whose sum is σ = 2119962195604. Its totient is φ = 2102441846400.

The previous prime is 2111202020987. The next prime is 2111202021053. The reversal of 2111202021001 is 1001202021112.

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 1071721857600 + 1039480163401 = 1035240^2 + 1019549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111202021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111202121001) 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, 4380086940 + ... + 4380087421.

It is an arithmetic number, because the mean of its divisors is an integer number (529990548901).

Almost surely, 2^{2111202021001} is an apocalyptic number.

It is an amenable number.

2111202021001 is a deficient number, since it is larger than the sum of its proper divisors (8760174603).

2111202021001 is an equidigital number, since it uses as much as digits as its factorization.

2111202021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8760174602.

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

Adding to 2111202021001 its reverse (1001202021112), we get a palindrome (3112404042113).

The spelling of 2111202021001 in words is "two trillion, one hundred eleven billion, two hundred two million, twenty-one thousand, one".