121121121222 has 48 divisors (see below), whose sum is σ = 270028135728. Its totient is φ = 39219710400.

The previous prime is 121121121217. The next prime is 121121121239. The reversal of 121121121222 is 222121121121.

121121121222 is a `hidden beast` number, since 1 + 211 + 211 + 21 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 = 121121121195 and 121121121204.

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, 532168 + ... + 724875.

It is an arithmetic number, because the mean of its divisors is an integer number (5625586161).

Almost surely, 2^121121121222 is an apocalyptic number.

121121121222 is an abundant number, since it is smaller than the sum of its proper divisors (148907014506).

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

121121121222 is a wasteful number, since it uses less digits than its factorization.

121121121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257205 (or 1257202 counting only the distinct ones).

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

Adding to 121121121222 its reverse (222121121121), we get a palindrome (343242242343).

It can be divided in two parts, 121121121 and 222, that multiplied together give a palindrome (26888888862).

The spelling of 121121121222 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".