121222000 has 40 divisors (see below), whose sum is σ = 293119632. Its totient is φ = 48488000.

The previous prime is 121221979. The next prime is 121222007. The reversal of 121222000 is 222121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28306 + ... + 32305.

Almost surely, 2^121222000 is an apocalyptic number.

121222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222000 is an abundant number, since it is smaller than the sum of its proper divisors (171897632).

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

121222000 is an equidigital number, since it uses as much as digits as its factorization.

121222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60634 (or 60618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 121222000 is about 11010.0862848572. The cubic root of 121222000 is about 494.9110475129.

Adding to 121222000 its reverse (222121), we get a palindrome (121444121).

The spelling of 121222000 in words is "one hundred twenty-one million, two hundred twenty-two thousand".