121212044 has 6 divisors (see below), whose sum is σ = 212121084. Its totient is φ = 60606020.

The previous prime is 121212017. The next prime is 121212071. The reversal of 121212044 is 440212121.

It is an interprime number because it is at equal distance from previous prime (121212017) and next prime (121212071).

It is a super-2 number, since 2×121212044² = 29384719221315872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15151502 + ... + 15151509.

It is an arithmetic number, because the mean of its divisors is an integer number (35353514).

Almost surely, 2^121212044 is an apocalyptic number.

It is an amenable number.

121212044 is a deficient number, since it is larger than the sum of its proper divisors (90909040).

121212044 is a wasteful number, since it uses less digits than its factorization.

121212044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30303015 (or 30303013 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 121212044 is about 11009.6341446935. The cubic root of 121212044 is about 494.8974980767.

Adding to 121212044 its reverse (440212121), we get a palindrome (561424165).

The spelling of 121212044 in words is "one hundred twenty-one million, two hundred twelve thousand, forty-four".