122021550 has 72 divisors (see below), whose sum is σ = 374673936. Its totient is φ = 27889920.

The previous prime is 122021527. The next prime is 122021561. The reversal of 122021550 is 55120221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16219 + ... + 22518.

Almost surely, 2^122021550 is an apocalyptic number.

122021550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122021550 is an abundant number, since it is smaller than the sum of its proper divisors (252652386).

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

122021550 is a wasteful number, since it uses less digits than its factorization.

122021550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38762 (or 38754 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 122021550 is about 11046.3364967758. The cubic root of 122021550 is about 495.9967671269.

Adding to 122021550 its reverse (55120221), we get a palindrome (177141771).

The spelling of 122021550 in words is "one hundred twenty-two million, twenty-one thousand, five hundred fifty".