1215626265121 has 16 divisors (see below), whose sum is σ = 1226738058624. Its totient is φ = 1204561822464.

The previous prime is 1215626265109. The next prime is 1215626265149.

1215626265121 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1215626265121 - 2⁹ = 1215626264609 is a prime.

It is a super-2 number, since 2×1215626265121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215626263121) 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, 89687481 + ... + 89701033.

It is an arithmetic number, because the mean of its divisors is an integer number (76671128664).

Almost surely, 2^{1215626265121} is an apocalyptic number.

It is an amenable number.

1215626265121 is a deficient number, since it is larger than the sum of its proper divisors (11111793503).

1215626265121 is a wasteful number, since it uses less digits than its factorization.

1215626265121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15240.

The product of its digits is 86400, while the sum is 40.

The spelling of 1215626265121 in words is "one trillion, two hundred fifteen billion, six hundred twenty-six million, two hundred sixty-five thousand, one hundred twenty-one".