1225561502112 has 48 divisors (see below), whose sum is σ = 3217341399552. Its totient is φ = 408489712640.

The previous prime is 1225561502041. The next prime is 1225561502141. The reversal of 1225561502112 is 2112051655221.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817537 + ... + 1766207.

It is an arithmetic number, because the mean of its divisors is an integer number (67027945824).

Almost surely, 2^{1225561502112} is an apocalyptic number.

1225561502112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225561502112 is an abundant number, since it is smaller than the sum of its proper divisors (1991779897440).

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

1225561502112 is a wasteful number, since it uses less digits than its factorization.

1225561502112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962141 (or 962133 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 1225561502112 in words is "one trillion, two hundred twenty-five billion, five hundred sixty-one million, five hundred two thousand, one hundred twelve".