121200111120001 has 16 divisors (see below), whose sum is σ = 127161791680000. Its totient is φ = 115366711363200.

The previous prime is 121200111119987. The next prime is 121200111120091. The reversal of 121200111120001 is 100021111002121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121200111120001 - 2²⁵ = 121200077565569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121200111120091) 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, 403179250 + ... + 403479748.

It is an arithmetic number, because the mean of its divisors is an integer number (7947611980000).

Almost surely, 2^{121200111120001} is an apocalyptic number.

It is an amenable number.

121200111120001 is a deficient number, since it is larger than the sum of its proper divisors (5961680559999).

121200111120001 is a wasteful number, since it uses less digits than its factorization.

121200111120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513880.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121200111120001 its reverse (100021111002121), we get a palindrome (221221222122122).

The spelling of 121200111120001 in words is "one hundred twenty-one trillion, two hundred billion, one hundred eleven million, one hundred twenty thousand, one".