121222143 has 16 divisors (see below), whose sum is σ = 205244160. Its totient is φ = 69269688.

The previous prime is 121222141. The next prime is 121222151. The reversal of 121222143 is 341222121.

It is a happy number.

It is not a de Polignac number, because 121222143 - 2¹ = 121222141 is a prime.

It is a super-3 number, since 3×121222143³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320505 + ... + 320882.

It is an arithmetic number, because the mean of its divisors is an integer number (12827760).

Almost surely, 2^121222143 is an apocalyptic number.

121222143 is a deficient number, since it is larger than the sum of its proper divisors (84022017).

121222143 is an equidigital number, since it uses as much as digits as its factorization.

121222143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641403 (or 641397 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 121222143 is about 11010.0927789006. The cubic root of 121222143 is about 494.9112421208.

Adding to 121222143 its reverse (341222121), we get a palindrome (462444264).

The spelling of 121222143 in words is "one hundred twenty-one million, two hundred twenty-two thousand, one hundred forty-three".