1210221112122 has 48 divisors (see below), whose sum is σ = 2937834068832. Its totient is φ = 356821947360.

The previous prime is 1210221112097. The next prime is 1210221112151. The reversal of 1210221112122 is 2212111220121.

1210221112122 is a `hidden beast` number, since 1 + 210 + 221 + 112 + 122 = 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 = 1210221112095 and 1210221112104.

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, 82590348 + ... + 82604999.

It is an arithmetic number, because the mean of its divisors is an integer number (61204876434).

Almost surely, 2^{1210221112122} is an apocalyptic number.

1210221112122 is an abundant number, since it is smaller than the sum of its proper divisors (1727612956710).

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

1210221112122 is a wasteful number, since it uses less digits than its factorization.

1210221112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165195403 (or 165195400 counting only the distinct ones).

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

Adding to 1210221112122 its reverse (2212111220121), we get a palindrome (3422332332243).

The spelling of 1210221112122 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty-two".