1221405014015 has 8 divisors (see below), whose sum is σ = 1466823096720. Its totient is φ = 976365957952.

The previous prime is 1221405013987. The next prime is 1221405014057. The reversal of 1221405014015 is 5104105041221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221405014015 - 2²⁴ = 1221388236799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94749569 + ... + 94762458.

It is an arithmetic number, because the mean of its divisors is an integer number (183352887090).

Almost surely, 2^{1221405014015} is an apocalyptic number.

1221405014015 is a deficient number, since it is larger than the sum of its proper divisors (245418082705).

1221405014015 is a wasteful number, since it uses less digits than its factorization.

1221405014015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189513321.

The product of its (nonzero) digits is 1600, while the sum is 26.

The spelling of 1221405014015 in words is "one trillion, two hundred twenty-one billion, four hundred five million, fourteen thousand, fifteen".