1221055125410 has 32 divisors (see below), whose sum is σ = 2217642890112. Its totient is φ = 484035713280.

The previous prime is 1221055125373. The next prime is 1221055125431. The reversal of 1221055125410 is 145215501221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8984987 + ... + 9119873.

It is an arithmetic number, because the mean of its divisors is an integer number (69301340316).

Almost surely, 2^{1221055125410} is an apocalyptic number.

1221055125410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221055125410 is a deficient number, since it is larger than the sum of its proper divisors (996587764702).

1221055125410 is a wasteful number, since it uses less digits than its factorization.

1221055125410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143018.

The product of its (nonzero) digits is 4000, while the sum is 29.

The spelling of 1221055125410 in words is "one trillion, two hundred twenty-one billion, fifty-five million, one hundred twenty-five thousand, four hundred ten".