1121305256406 has 12 divisors (see below), whose sum is σ = 2429494722252. Its totient is φ = 373768418796.

The previous prime is 1121305256371. The next prime is 1121305256431. The reversal of 1121305256406 is 6046525031211.

1121305256406 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 3 + 0 + 5 + 2 + 5 + 640 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31147368216 + ... + 31147368251.

It is an arithmetic number, because the mean of its divisors is an integer number (202457893521).

Almost surely, 2^{1121305256406} is an apocalyptic number.

1121305256406 is an abundant number, since it is smaller than the sum of its proper divisors (1308189465846).

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

1121305256406 is a wasteful number, since it uses less digits than its factorization.

1121305256406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62294736475 (or 62294736472 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 1121305256406 in words is "one trillion, one hundred twenty-one billion, three hundred five million, two hundred fifty-six thousand, four hundred six".