11891321207 has 2 divisors, whose sum is σ = 11891321208. Its totient is φ = 11891321206.

The previous prime is 11891321131. The next prime is 11891321231. The reversal of 11891321207 is 70212319811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11891321207 - 2¹² = 11891317111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11891321237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945660603 + 5945660604.

It is an arithmetic number, because the mean of its divisors is an integer number (5945660604).

Almost surely, 2^11891321207 is an apocalyptic number.

11891321207 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891321207 is an equidigital number, since it uses as much as digits as its factorization.

11891321207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 11891321207 in words is "eleven billion, eight hundred ninety-one million, three hundred twenty-one thousand, two hundred seven".