121421552 has 40 divisors (see below), whose sum is σ = 283017600. Its totient is φ = 49298112.

The previous prime is 121421519. The next prime is 121421563. The reversal of 121421552 is 255124121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26402 + ... + 30657.

It is an arithmetic number, because the mean of its divisors is an integer number (7075440).

Almost surely, 2^121421552 is an apocalyptic number.

It is an amenable number.

121421552 is an abundant number, since it is smaller than the sum of its proper divisors (161596048).

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

121421552 is a wasteful number, since it uses less digits than its factorization.

121421552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57093 (or 57087 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 121421552 is about 11019.1447944021. The cubic root of 121421552 is about 495.1824678456.

Adding to 121421552 its reverse (255124121), we get a palindrome (376545673).

The spelling of 121421552 in words is "one hundred twenty-one million, four hundred twenty-one thousand, five hundred fifty-two".