1221112210122 has 96 divisors (see below), whose sum is σ = 3134452194432. Its totient is φ = 336287106432.

The previous prime is 1221112210099. The next prime is 1221112210169. The reversal of 1221112210122 is 2210122111221.

1221112210122 is a `hidden beast` number, since 1 + 221 + 112 + 210 + 122 = 666.

It is a super-2 number, since 2×1221112210122² (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 = 1221112210095 and 1221112210104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 725133 + ... + 1722800.

It is an arithmetic number, because the mean of its divisors is an integer number (32650543692).

Almost surely, 2^{1221112210122} is an apocalyptic number.

1221112210122 is an abundant number, since it is smaller than the sum of its proper divisors (1913339984310).

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

1221112210122 is a wasteful number, since it uses less digits than its factorization.

1221112210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448092 (or 2448089 counting only the distinct ones).

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

Adding to 1221112210122 its reverse (2210122111221), we get a palindrome (3431234321343).

The spelling of 1221112210122 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred ten thousand, one hundred twenty-two".