1212211102122 has 56 divisors (see below), whose sum is σ = 2792721348900. Its totient is φ = 394214973120.

The previous prime is 1212211102057. The next prime is 1212211102133. The reversal of 1212211102122 is 2212011122121.

1212211102122 is a `hidden beast` number, since 121 + 221 + 110 + 212 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1197337104441 + 14873997681 = 1094229^2 + 121959^2 .

It is a super-2 number, since 2×1212211102122² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1212211102095 and 1212211102104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10079497 + ... + 10199052.

Almost surely, 2^{1212211102122} is an apocalyptic number.

1212211102122 is an abundant number, since it is smaller than the sum of its proper divisors (1580510246778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212211102122 is an equidigital number, since it uses as much as digits as its factorization.

1212211102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20278610 (or 20278595 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212211102122 its reverse (2212011122121), we get a palindrome (3424222224243).

The spelling of 1212211102122 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred two thousand, one hundred twenty-two".