1221222111122 has 24 divisors (see below), whose sum is σ = 1985664592404. Its totient is φ = 563049387264.

The previous prime is 1221222111071. The next prime is 1221222111127. The reversal of 1221222111122 is 2211112221221.

It can be written as a sum of positive squares in 6 ways, for example, as 40824606601 + 1180397504521 = 202051^2 + 1086461^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1221222111094 and 1221222111103.

It is not an unprimeable number, because it can be changed into a prime (1221222111127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1573523 + ... + 2217750.

Almost surely, 2^{1221222111122} is an apocalyptic number.

1221222111122 is a deficient number, since it is larger than the sum of its proper divisors (764442481282).

1221222111122 is a wasteful number, since it uses less digits than its factorization.

1221222111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792254 (or 3792241 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 1221222111122 its reverse (2211112221221), we get a palindrome (3432334332343).

The spelling of 1221222111122 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twenty-two".