1245252120031 has 4 divisors (see below), whose sum is σ = 1247633099752. Its totient is φ = 1242871140312.

The previous prime is 1245252120001. The next prime is 1245252120059. The reversal of 1245252120031 is 1300212525421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1245252120031 - 2⁵ = 1245252119999 is a prime.

It is a super-2 number, since 2×1245252120031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245252120001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190489076 + ... + 1190490121.

It is an arithmetic number, because the mean of its divisors is an integer number (311908274938).

Almost surely, 2^{1245252120031} is an apocalyptic number.

1245252120031 is a deficient number, since it is larger than the sum of its proper divisors (2380979721).

1245252120031 is an equidigital number, since it uses as much as digits as its factorization.

1245252120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380979720.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1245252120031 its reverse (1300212525421), we get a palindrome (2545464645452).

The spelling of 1245252120031 in words is "one trillion, two hundred forty-five billion, two hundred fifty-two million, one hundred twenty thousand, thirty-one".