1245355121223 has 40 divisors (see below), whose sum is σ = 1892731435760. Its totient is φ = 815844078720.

The previous prime is 1245355121209. The next prime is 1245355121281. The reversal of 1245355121223 is 3221215535421.

1245355121223 is a `hidden beast` number, since 1 + 24 + 53 + 551 + 2 + 12 + 23 = 666.

It is not a de Polignac number, because 1245355121223 - 2⁴ = 1245355121207 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 (1245355121323) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1939113 + ... + 2500173.

It is an arithmetic number, because the mean of its divisors is an integer number (47318285894).

Almost surely, 2^{1245355121223} is an apocalyptic number.

1245355121223 is a deficient number, since it is larger than the sum of its proper divisors (647376314537).

1245355121223 is an equidigital number, since it uses as much as digits as its factorization.

1245355121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561549 (or 561540 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 1245355121223 in words is "one trillion, two hundred forty-five billion, three hundred fifty-five million, one hundred twenty-one thousand, two hundred twenty-three".