1220433023251 has 16 divisors (see below), whose sum is σ = 1323487821600. Its totient is φ = 1125362038944.

The previous prime is 1220433023221. The next prime is 1220433023287. The reversal of 1220433023251 is 1523203340221.

It is a happy number.

It is not a de Polignac number, because 1220433023251 - 2¹⁷ = 1220432892179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220433023221) 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, 1787265 + ... + 2373853.

It is an arithmetic number, because the mean of its divisors is an integer number (82717988850).

Almost surely, 2^{1220433023251} is an apocalyptic number.

1220433023251 is a deficient number, since it is larger than the sum of its proper divisors (103054798349).

1220433023251 is an frugal number, since it uses more digits than its factorization.

1220433023251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587575 (or 587549 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 1220433023251 its reverse (1523203340221), we get a palindrome (2743636363472).

The spelling of 1220433023251 in words is "one trillion, two hundred twenty billion, four hundred thirty-three million, twenty-three thousand, two hundred fifty-one".