121550620 has 48 divisors (see below), whose sum is σ = 261273600. Its totient is φ = 47485760.

The previous prime is 121550617. The next prime is 121550633. The reversal of 121550620 is 26055121.

It is a junction number, because it is equal to n+sod(n) for n = 121550591 and 121550600.

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 15 ways as a sum of consecutive naturals, for example, 281805 + ... + 282235.

It is an arithmetic number, because the mean of its divisors is an integer number (5443200).

Almost surely, 2^121550620 is an apocalyptic number.

121550620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121550620 is an abundant number, since it is smaller than the sum of its proper divisors (139722980).

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

121550620 is a wasteful number, since it uses less digits than its factorization.

121550620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 121550620 is about 11024.9997732426. Note that the first 3 decimals coincide. The cubic root of 121550620 is about 495.3578611410.

The spelling of 121550620 in words is "one hundred twenty-one million, five hundred fifty thousand, six hundred twenty".