1221017107057 has 16 divisors (see below), whose sum is σ = 1347646633344. Its totient is φ = 1097066880000.

The previous prime is 1221017107033. The next prime is 1221017107097. The reversal of 1221017107057 is 7507017101221.

It is a cyclic number.

It is not a de Polignac number, because 1221017107057 - 2⁷ = 1221017106929 is a prime.

It is a super-3 number, since 3×1221017107057³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221017107097) by changing a digit.

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, 1538544 + ... + 2192977.

It is an arithmetic number, because the mean of its divisors is an integer number (84227914584).

Almost surely, 2^{1221017107057} is an apocalyptic number.

It is an amenable number.

1221017107057 is a deficient number, since it is larger than the sum of its proper divisors (126629526287).

1221017107057 is a wasteful number, since it uses less digits than its factorization.

1221017107057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731880.

The product of its (nonzero) digits is 6860, while the sum is 34.

The spelling of 1221017107057 in words is "one trillion, two hundred twenty-one billion, seventeen million, one hundred seven thousand, fifty-seven".