2111101112021 has 4 divisors (see below), whose sum is σ = 2303019394944. Its totient is φ = 1919182829100.

The previous prime is 2111101111993. The next prime is 2111101112023. The reversal of 2111101112021 is 1202111011112.

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 2111101112021 - 2¹⁰ = 2111101110997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111101111987 and 2111101112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111101112023) 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, 95959141445 + ... + 95959141466.

It is an arithmetic number, because the mean of its divisors is an integer number (575754848736).

Almost surely, 2^{2111101112021} is an apocalyptic number.

It is an amenable number.

2111101112021 is a deficient number, since it is larger than the sum of its proper divisors (191918282923).

2111101112021 is a wasteful number, since it uses less digits than its factorization.

2111101112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191918282922.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2111101112021 its reverse (1202111011112), we get a palindrome (3313212123133).

The spelling of 2111101112021 in words is "two trillion, one hundred eleven billion, one hundred one million, one hundred twelve thousand, twenty-one".