1122121102220 has 72 divisors (see below), whose sum is σ = 2634971937360. Its totient is φ = 400211573760.

The previous prime is 1122121102217. The next prime is 1122121102229. The reversal of 1122121102220 is 222011212211.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (1122121102229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4999091 + ... + 5218730.

Almost surely, 2^{1122121102220} is an apocalyptic number.

1122121102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122121102220 is an abundant number, since it is smaller than the sum of its proper divisors (1512850835140).

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

1122121102220 is a wasteful number, since it uses less digits than its factorization.

1122121102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10217883 (or 10217864 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1122121102220 its reverse (222011212211), we get a palindrome (1344132314431).

The spelling of 1122121102220 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty".