1221100011007 has 2 divisors, whose sum is σ = 1221100011008. Its totient is φ = 1221100011006.

The previous prime is 1221100010993. The next prime is 1221100011031. The reversal of 1221100011007 is 7001100011221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221100011007 - 2³⁹ = 671344197119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221100011107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610550005503 + 610550005504.

It is an arithmetic number, because the mean of its divisors is an integer number (610550005504).

Almost surely, 2^{1221100011007} is an apocalyptic number.

1221100011007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221100011007 is an equidigital number, since it uses as much as digits as its factorization.

1221100011007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 1221100011007 its reverse (7001100011221), we get a palindrome (8222200022228).

The spelling of 1221100011007 in words is "one trillion, two hundred twenty-one billion, one hundred million, eleven thousand, seven".