1220405042515 has 8 divisors (see below), whose sum is σ = 1528159357728. Its totient is φ = 933875162880.

The previous prime is 1220405042497. The next prime is 1220405042539. The reversal of 1220405042515 is 5152405040221.

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

It is not a de Polignac number, because 1220405042515 - 2³⁷ = 1082966089043 is a prime.

It is a Duffinian 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, 5306108766 + ... + 5306108995.

It is an arithmetic number, because the mean of its divisors is an integer number (191019919716).

Almost surely, 2^{1220405042515} is an apocalyptic number.

1220405042515 is a deficient number, since it is larger than the sum of its proper divisors (307754315213).

1220405042515 is a wasteful number, since it uses less digits than its factorization.

1220405042515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10612217789.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 1220405042515 in words is "one trillion, two hundred twenty billion, four hundred five million, forty-two thousand, five hundred fifteen".