1215120215121 has 16 divisors (see below), whose sum is σ = 1726977024000. Its totient is φ = 757311396608.

The previous prime is 1215120215107. The next prime is 1215120215129.

1215120215121 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1215120215121 - 2¹⁰ = 1215120214097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215120215091 and 1215120215100.

It is not an unprimeable number, because it can be changed into a prime (1215120215129) 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, 79945041 + ... + 79960238.

It is an arithmetic number, because the mean of its divisors is an integer number (107936064000).

Almost surely, 2^{1215120215121} is an apocalyptic number.

It is an amenable number.

1215120215121 is a deficient number, since it is larger than the sum of its proper divisors (511856808879).

1215120215121 is a wasteful number, since it uses less digits than its factorization.

1215120215121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159905448.

The product of its (nonzero) digits is 400, while the sum is 24.

The spelling of 1215120215121 in words is "one trillion, two hundred fifteen billion, one hundred twenty million, two hundred fifteen thousand, one hundred twenty-one".