1221102122179 has 2 divisors, whose sum is σ = 1221102122180. Its totient is φ = 1221102122178.

The previous prime is 1221102122173. The next prime is 1221102122221. The reversal of 1221102122179 is 9712212011221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9712212011221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221102122179 - 2²⁷ = 1220967904451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221102122179.

It is not a weakly prime, because it can be changed into another prime (1221102122173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610551061089 + 610551061090.

It is an arithmetic number, because the mean of its divisors is an integer number (610551061090).

Almost surely, 2^{1221102122179} is an apocalyptic number.

1221102122179 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221102122179 is an equidigital number, since it uses as much as digits as its factorization.

1221102122179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

It can be divided in two parts, 1221102 and 122179, that added together give a square (1343281 = 1159²).

The spelling of 1221102122179 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred twenty-two thousand, one hundred seventy-nine".