122222142 has 32 divisors (see below), whose sum is σ = 310406400. Its totient is φ = 34920504.

The previous prime is 122222131. The next prime is 122222143. The reversal of 122222142 is 241222221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222143) 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, 161292 + ... + 162047.

It is an arithmetic number, because the mean of its divisors is an integer number (9700200).

Almost surely, 2^122222142 is an apocalyptic number.

122222142 is an abundant number, since it is smaller than the sum of its proper divisors (188184258).

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

122222142 is a wasteful number, since it uses less digits than its factorization.

122222142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323357 (or 323351 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 122222142 is about 11055.4123396642. The cubic root of 122222142 is about 496.2684090737.

Adding to 122222142 its reverse (241222221), we get a palindrome (363444363).

The spelling of 122222142 in words is "one hundred twenty-two million, two hundred twenty-two thousand, one hundred forty-two".