121222021122 has 48 divisors (see below), whose sum is σ = 274006579392. Its totient is φ = 40165353360.

The previous prime is 121222021121. The next prime is 121222021139. The reversal of 121222021122 is 221120222121.

It is a happy number.

121222021122 is a `hidden beast` number, since 1 + 212 + 220 + 211 + 22 = 666.

It is a super-2 number, since 2×121222021122² (a number of 23 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 = 121222021095 and 121222021104.

It is not an unprimeable number, because it can be changed into a prime (121222021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 665629 + ... + 827952.

It is an arithmetic number, because the mean of its divisors is an integer number (5708470404).

Almost surely, 2^121222021122 is an apocalyptic number.

121222021122 is an abundant number, since it is smaller than the sum of its proper divisors (152784558270).

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

121222021122 is a wasteful number, since it uses less digits than its factorization.

121222021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493765 (or 1493753 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121222021122 its reverse (221120222121), we get a palindrome (342342243243).

The spelling of 121222021122 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-two".