2101111312121 has 8 divisors (see below), whose sum is σ = 2132398082304. Its totient is φ = 2070047224000.

The previous prime is 2101111312109. The next prime is 2101111312127. The reversal of 2101111312121 is 1212131111012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101111312121 - 2²² = 2101107117817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101111312121.

It is not an unprimeable number, because it can be changed into a prime (2101111312127) 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, 55651505 + ... + 55689246.

It is an arithmetic number, because the mean of its divisors is an integer number (266549760288).

Almost surely, 2^{2101111312121} is an apocalyptic number.

It is an amenable number.

2101111312121 is a deficient number, since it is larger than the sum of its proper divisors (31286770183).

2101111312121 is a wasteful number, since it uses less digits than its factorization.

2101111312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111341031.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 2101111312121 its reverse (1212131111012), we get a palindrome (3313242423133).

The spelling of 2101111312121 in words is "two trillion, one hundred one billion, one hundred eleven million, three hundred twelve thousand, one hundred twenty-one".