1222100121105 has 48 divisors (see below), whose sum is σ = 2155538810880. Its totient is φ = 640381572864.

The previous prime is 1222100121101. The next prime is 1222100121119. The reversal of 1222100121105 is 5011210012221.

It is not a de Polignac number, because 1222100121105 - 2² = 1222100121101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222100121101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 625581 + ... + 1683909.

It is an arithmetic number, because the mean of its divisors is an integer number (44907058560).

Almost surely, 2^{1222100121105} is an apocalyptic number.

1222100121105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222100121105 is a deficient number, since it is larger than the sum of its proper divisors (933438689775).

1222100121105 is a wasteful number, since it uses less digits than its factorization.

1222100121105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058790 (or 1058787 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 1222100121105 its reverse (5011210012221), we get a palindrome (6233310133326).

The spelling of 1222100121105 in words is "one trillion, two hundred twenty-two billion, one hundred million, one hundred twenty-one thousand, one hundred five".