121602870 has 80 divisors (see below), whose sum is σ = 346249728. Its totient is φ = 30516480.

The previous prime is 121602847. The next prime is 121602917. The reversal of 121602870 is 78206121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9355 + ... + 18185.

Almost surely, 2^121602870 is an apocalyptic number.

121602870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121602870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173124864).

121602870 is an abundant number, since it is smaller than the sum of its proper divisors (224646858).

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

121602870 is a wasteful number, since it uses less digits than its factorization.

121602870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8867 (or 8858 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 121602870 is about 11027.3691332067. The cubic root of 121602870 is about 495.4288294901.

Adding to 121602870 its reverse (78206121), we get a palindrome (199808991).

The spelling of 121602870 in words is "one hundred twenty-one million, six hundred two thousand, eight hundred seventy".