2111002011221 has 4 divisors (see below), whose sum is σ = 2111005800000. Its totient is φ = 2110998222444.

The previous prime is 2111002011163. The next prime is 2111002011227. The reversal of 2111002011221 is 1221102001112.

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 2111002011221 - 2¹⁴ = 2111001994837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111002011196 and 2111002011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111002011227) 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, 876221 + ... + 2233778.

It is an arithmetic number, because the mean of its divisors is an integer number (527751450000).

Almost surely, 2^{2111002011221} is an apocalyptic number.

It is an amenable number.

2111002011221 is a deficient number, since it is larger than the sum of its proper divisors (3788779).

2111002011221 is an equidigital number, since it uses as much as digits as its factorization.

2111002011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788778.

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

Adding to 2111002011221 its reverse (1221102001112), we get a palindrome (3332104012333).

The spelling of 2111002011221 in words is "two trillion, one hundred eleven billion, two million, eleven thousand, two hundred twenty-one".