1255005031021 has 8 divisors (see below), whose sum is σ = 1434319225920. Its totient is φ = 1075697776608.

The previous prime is 1255005031003. The next prime is 1255005031043. The reversal of 1255005031021 is 1201305005521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1255005031021 - 2¹⁹ = 1255004506733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255005031321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341691 + ... + 2076088.

It is an arithmetic number, because the mean of its divisors is an integer number (179289903240).

Almost surely, 2^{1255005031021} is an apocalyptic number.

It is an amenable number.

1255005031021 is a deficient number, since it is larger than the sum of its proper divisors (179314194899).

1255005031021 is an equidigital number, since it uses as much as digits as its factorization.

1255005031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470243.

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 1255005031021 in words is "one trillion, two hundred fifty-five billion, five million, thirty-one thousand, twenty-one".