1222111212120 has 96 divisors (see below), whose sum is σ = 4079209090320. Its totient is φ = 317088311040.

The previous prime is 1222111212103. The next prime is 1222111212131. The reversal of 1222111212120 is 212121112221.

1222111212120 is a `hidden beast` number, since 1 + 222 + 111 + 212 + 120 = 666.

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 = 1222111212093 and 1222111212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45861726 + ... + 45888365.

Almost surely, 2^{1222111212120} is an apocalyptic number.

1222111212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222111212120 is an abundant number, since it is smaller than the sum of its proper divisors (2857097878200).

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

1222111212120 is a wasteful number, since it uses less digits than its factorization.

1222111212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91750145 (or 91750138 counting only the distinct ones).

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

Adding to 1222111212120 its reverse (212121112221), we get a palindrome (1434232324341).

It can be divided in two parts, 122211 and 1212120, that added together give a palindrome (1334331).

The spelling of 1222111212120 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty".