11451212197 has 2 divisors, whose sum is σ = 11451212198. Its totient is φ = 11451212196.

The previous prime is 11451212153. The next prime is 11451212203. The reversal of 11451212197 is 79121215411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7112223556 + 4338988641 = 84334^2 + 65871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11451212197 is a prime.

It is a super-2 number, since 2×11451212197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11451213197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5725606098 + 5725606099.

It is an arithmetic number, because the mean of its divisors is an integer number (5725606099).

Almost surely, 2^11451212197 is an apocalyptic number.

It is an amenable number.

11451212197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11451212197 is an equidigital number, since it uses as much as digits as its factorization.

11451212197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 34.

The spelling of 11451212197 in words is "eleven billion, four hundred fifty-one million, two hundred twelve thousand, one hundred ninety-seven".