121442436 has 48 divisors (see below), whose sum is σ = 323370880. Its totient is φ = 39385440.

The previous prime is 121442389. The next prime is 121442437. The reversal of 121442436 is 634244121.

It is a happy number.

It is a super-2 number, since 2×121442436² = 29496530523228192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (121442437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11200 + ... + 19191.

Almost surely, 2^121442436 is an apocalyptic number.

It is an amenable number.

121442436 is an abundant number, since it is smaller than the sum of its proper divisors (201928444).

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

121442436 is a wasteful number, since it uses less digits than its factorization.

121442436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30441 (or 30433 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 121442436 is about 11020.0923771083. The cubic root of 121442436 is about 495.2108559904.

Adding to 121442436 its reverse (634244121), we get a palindrome (755686557).

The spelling of 121442436 in words is "one hundred twenty-one million, four hundred forty-two thousand, four hundred thirty-six".