121116620 has 48 divisors (see below), whose sum is σ = 266632128. Its totient is φ = 46126080.

The previous prime is 121116553. The next prime is 121116623. The reversal of 121116620 is 26611121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121116592 and 121116601.

It is not an unprimeable number, because it can be changed into a prime (121116623) 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, 128792 + ... + 129728.

It is an arithmetic number, because the mean of its divisors is an integer number (5554836).

Almost surely, 2^121116620 is an apocalyptic number.

121116620 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 121116620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133316064).

121116620 is an abundant number, since it is smaller than the sum of its proper divisors (145515508).

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

121116620 is a wasteful number, since it uses less digits than its factorization.

121116620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 121116620 is about 11005.2996324498. The cubic root of 121116620 is about 494.7675948774.

Adding to 121116620 its reverse (26611121), we get a palindrome (147727741).

The spelling of 121116620 in words is "one hundred twenty-one million, one hundred sixteen thousand, six hundred twenty".