2111121102021 has 8 divisors (see below), whose sum is σ = 2814834914304. Its totient is φ = 1407410678880.

The previous prime is 2111121102007. The next prime is 2111121102047. The reversal of 2111121102021 is 1202011211112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111121102021 - 2¹⁰ = 2111121100997 is a prime.

It is a super-2 number, since 2×2111121102021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111121102421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1701385 + ... + 2667761.

It is an arithmetic number, because the mean of its divisors is an integer number (351854364288).

Almost surely, 2^{2111121102021} is an apocalyptic number.

It is an amenable number.

2111121102021 is a deficient number, since it is larger than the sum of its proper divisors (703713812283).

2111121102021 is an equidigital number, since it uses as much as digits as its factorization.

2111121102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694571.

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

Adding to 2111121102021 its reverse (1202011211112), we get a palindrome (3313132313133).

The spelling of 2111121102021 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, one hundred two thousand, twenty-one".