1221170954366 has 32 divisors (see below), whose sum is σ = 2067786960480. Its totient is φ = 535781276800.

The previous prime is 1221170954327. The next prime is 1221170954371. The reversal of 1221170954366 is 6634590711221.

It is a happy number.

It is a super-3 number, since 3×1221170954366³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221170954366.

It is a congruent number.

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, 1931600 + ... + 2484636.

It is an arithmetic number, because the mean of its divisors is an integer number (64618342515).

Almost surely, 2^{1221170954366} is an apocalyptic number.

1221170954366 is a deficient number, since it is larger than the sum of its proper divisors (846616006114).

1221170954366 is a wasteful number, since it uses less digits than its factorization.

1221170954366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556540.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 1221170954366 in words is "one trillion, two hundred twenty-one billion, one hundred seventy million, nine hundred fifty-four thousand, three hundred sixty-six".