1220023135325 has 6 divisors (see below), whose sum is σ = 1512828687834. Its totient is φ = 976018508240.

The previous prime is 1220023135321. The next prime is 1220023135337. The reversal of 1220023135325 is 5235313200221.

It can be written as a sum of positive squares in 3 ways, for example, as 74072154244 + 1145950981081 = 272162^2 + 1070491^2 .

It is not a de Polignac number, because 1220023135325 - 2² = 1220023135321 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 (1220023135321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24400462682 + ... + 24400462731.

It is an arithmetic number, because the mean of its divisors is an integer number (252138114639).

Almost surely, 2^{1220023135325} is an apocalyptic number.

It is an amenable number.

1220023135325 is a deficient number, since it is larger than the sum of its proper divisors (292805552509).

1220023135325 is an equidigital number, since it uses as much as digits as its factorization.

1220023135325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48800925423 (or 48800925418 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 1220023135325 its reverse (5235313200221), we get a palindrome (6455336335546).

The spelling of 1220023135325 in words is "one trillion, two hundred twenty billion, twenty-three million, one hundred thirty-five thousand, three hundred twenty-five".