1221101012107 has 2 divisors, whose sum is σ = 1221101012108. Its totient is φ = 1221101012106.

The previous prime is 1221101012101. The next prime is 1221101012221. The reversal of 1221101012107 is 7012101011221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221101012107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221101012101) 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 as a sum of consecutive naturals, namely, 610550506053 + 610550506054.

It is an arithmetic number, because the mean of its divisors is an integer number (610550506054).

Almost surely, 2^{1221101012107} is an apocalyptic number.

1221101012107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221101012107 is an equidigital number, since it uses as much as digits as its factorization.

1221101012107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 1221101012107 its reverse (7012101011221), we get a palindrome (8233202023328).

The spelling of 1221101012107 in words is "one trillion, two hundred twenty-one billion, one hundred one million, twelve thousand, one hundred seven".