1220000304551 has 48 divisors (see below), whose sum is σ = 1489816514880. Its totient is φ = 994754880000.

The previous prime is 1220000304527. The next prime is 1220000304557. The reversal of 1220000304551 is 1554030000221.

It is not a de Polignac number, because 1220000304551 - 2²² = 1219996110247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000304557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191790611 + ... + 191796971.

It is an arithmetic number, because the mean of its divisors is an integer number (31037844060).

Almost surely, 2^{1220000304551} is an apocalyptic number.

1220000304551 is a deficient number, since it is larger than the sum of its proper divisors (269816210329).

1220000304551 is a wasteful number, since it uses less digits than its factorization.

1220000304551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8376 (or 8369 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 1220000304551 its reverse (1554030000221), we get a palindrome (2774030304772).

The spelling of 1220000304551 in words is "one trillion, two hundred twenty billion, three hundred four thousand, five hundred fifty-one".