2101111222021 has 16 divisors (see below), whose sum is σ = 2637550540800. Its totient is φ = 1631984392368.

The previous prime is 2101111222003. The next prime is 2101111222069. The reversal of 2101111222021 is 1202221111012.

It is a cyclic number.

It is not a de Polignac number, because 2101111222021 - 2¹³ = 2101111213829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101111221986 and 2101111222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101111222081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343428001 + ... + 343434118.

It is an arithmetic number, because the mean of its divisors is an integer number (164846908800).

Almost surely, 2^{2101111222021} is an apocalyptic number.

It is an amenable number.

2101111222021 is a deficient number, since it is larger than the sum of its proper divisors (536439318779).

2101111222021 is a wasteful number, since it uses less digits than its factorization.

2101111222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686862168.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2101111222021 its reverse (1202221111012), we get a palindrome (3303332333033).

The spelling of 2101111222021 in words is "two trillion, one hundred one billion, one hundred eleven million, two hundred twenty-two thousand, twenty-one".