11915011971229 has 2 divisors, whose sum is σ = 11915011971230. Its totient is φ = 11915011971228.

The previous prime is 11915011971119. The next prime is 11915011971263. The reversal of 11915011971229 is 92217911051911.

It is a happy number.

11915011971229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9596086040025 + 2318925931204 = 3097755^2 + 1522802^2 .

It is an emirp because it is prime and its reverse (92217911051911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11915011971229 - 2¹⁵ = 11915011938461 is a prime.

It is a super-3 number, since 3×11915011971229³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11915011977229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5957505985614 + 5957505985615.

It is an arithmetic number, because the mean of its divisors is an integer number (5957505985615).

Almost surely, 2^{11915011971229} is an apocalyptic number.

It is an amenable number.

11915011971229 is a deficient number, since it is larger than the sum of its proper divisors (1).

11915011971229 is an equidigital number, since it uses as much as digits as its factorization.

11915011971229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 49.

The spelling of 11915011971229 in words is "eleven trillion, nine hundred fifteen billion, eleven million, nine hundred seventy-one thousand, two hundred twenty-nine".