1251106020240 has 40 divisors (see below), whose sum is σ = 3878428663488. Its totient is φ = 333628272000.

The previous prime is 1251106020211. The next prime is 1251106020259. The reversal of 1251106020240 is 420206011521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1251106020240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2606470636 + ... + 2606471115.

Almost surely, 2^{1251106020240} is an apocalyptic number.

1251106020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251106020240 is an abundant number, since it is smaller than the sum of its proper divisors (2627322643248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251106020240 is a wasteful number, since it uses less digits than its factorization.

1251106020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212941767 (or 5212941761 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 1251106020240 in words is "one trillion, two hundred fifty-one billion, one hundred six million, twenty thousand, two hundred forty".