2111101221021 has 16 divisors (see below), whose sum is σ = 3032593831680. Its totient is φ = 1298595355200.

The previous prime is 2111101221017. The next prime is 2111101221023. The reversal of 2111101221021 is 1201221011112.

It is a happy number.

It is not a de Polignac number, because 2111101221021 - 2² = 2111101221017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111101221023) 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, 11236005 + ... + 11422346.

It is an arithmetic number, because the mean of its divisors is an integer number (189537114480).

Almost surely, 2^{2111101221021} is an apocalyptic number.

It is an amenable number.

2111101221021 is a deficient number, since it is larger than the sum of its proper divisors (921492610659).

2111101221021 is a wasteful number, since it uses less digits than its factorization.

2111101221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22660756.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2111101221021 its reverse (1201221011112), we get a palindrome (3312322232133).

The spelling of 2111101221021 in words is "two trillion, one hundred eleven billion, one hundred one million, two hundred twenty-one thousand, twenty-one".