1220515250451 has 24 divisors (see below), whose sum is σ = 1901310682320. Its totient is φ = 694391689152.

The previous prime is 1220515250447. The next prime is 1220515250501. The reversal of 1220515250451 is 1540525150221.

It is not a de Polignac number, because 1220515250451 - 2² = 1220515250447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220515250431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18094776 + ... + 18162101.

It is an arithmetic number, because the mean of its divisors is an integer number (79221278430).

Almost surely, 2^{1220515250451} is an apocalyptic number.

1220515250451 is a deficient number, since it is larger than the sum of its proper divisors (680795431869).

1220515250451 is a wasteful number, since it uses less digits than its factorization.

1220515250451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36257123 (or 36257116 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 1220515250451 in words is "one trillion, two hundred twenty billion, five hundred fifteen million, two hundred fifty thousand, four hundred fifty-one".