121442620 has 48 divisors (see below), whose sum is σ = 276157728. Its totient is φ = 44593920.

The previous prime is 121442603. The next prime is 121442627. The reversal of 121442620 is 26244121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121442591 and 121442600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50035 + ... + 52405.

It is an arithmetic number, because the mean of its divisors is an integer number (5753286).

Almost surely, 2^121442620 is an apocalyptic number.

121442620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121442620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138078864).

121442620 is an abundant number, since it is smaller than the sum of its proper divisors (154715108).

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

121442620 is a wasteful number, since it uses less digits than its factorization.

121442620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590 (or 2588 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 121442620 is about 11020.1007254925. The cubic root of 121442620 is about 495.2111060918.

Adding to 121442620 its reverse (26244121), we get a palindrome (147686741).

It can be divided in two parts, 1214 and 42620, that added together give a palindrome (43834).

The spelling of 121442620 in words is "one hundred twenty-one million, four hundred forty-two thousand, six hundred twenty".