11211212121097 has 2 divisors, whose sum is σ = 11211212121098. Its totient is φ = 11211212121096.

The previous prime is 11211212121073. The next prime is 11211212121163. The reversal of 11211212121097 is 79012121211211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9749250619641 + 1461961501456 = 3122379^2 + 1209116^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211212121097 - 2²⁷ = 11211077903369 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211212121007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605606060548 + 5605606060549.

It is an arithmetic number, because the mean of its divisors is an integer number (5605606060549).

Almost surely, 2^{11211212121097} is an apocalyptic number.

It is an amenable number.

11211212121097 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211212121097 is an equidigital number, since it uses as much as digits as its factorization.

11211212121097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 31.

The spelling of 11211212121097 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, ninety-seven".