121212101121 has 16 divisors (see below), whose sum is σ = 166454402304. Its totient is φ = 78401309184.

The previous prime is 121212101107. The next prime is 121212101123. The reversal of 121212101121 is 121101212121.

It is a happy number.

It is not a de Polignac number, because 121212101121 - 2⁶ = 121212101057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121212101121.

It is not an unprimeable number, because it can be changed into a prime (121212101123) 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, 1507561 + ... + 1585926.

It is an arithmetic number, because the mean of its divisors is an integer number (10403400144).

Almost surely, 2^121212101121 is an apocalyptic number.

It is an amenable number.

121212101121 is a deficient number, since it is larger than the sum of its proper divisors (45242301183).

121212101121 is a wasteful number, since it uses less digits than its factorization.

121212101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093880.

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

Adding to 121212101121 its reverse (121101212121), we get a palindrome (242313313242).

The spelling of 121212101121 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred one thousand, one hundred twenty-one".