121110212121101 has 16 divisors (see below), whose sum is σ = 138523023345408. Its totient is φ = 103725260035200.

The previous prime is 121110212121097. The next prime is 121110212121163. The reversal of 121110212121101 is 101121212011121.

It is a cyclic number.

It is not a de Polignac number, because 121110212121101 - 2² = 121110212121097 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 121110212121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110212141101) 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, 68480081 + ... + 70226361.

It is an arithmetic number, because the mean of its divisors is an integer number (8657688959088).

Almost surely, 2^{121110212121101} is an apocalyptic number.

It is an amenable number.

121110212121101 is a deficient number, since it is larger than the sum of its proper divisors (17412811224307).

121110212121101 is a wasteful number, since it uses less digits than its factorization.

121110212121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754252.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121110212121101 its reverse (101121212011121), we get a palindrome (222231424132222).

The spelling of 121110212121101 in words is "one hundred twenty-one trillion, one hundred ten billion, two hundred twelve million, one hundred twenty-one thousand, one hundred one".