121870122 has 64 divisors (see below), whose sum is σ = 281957760. Its totient is φ = 34764800.

The previous prime is 121870117. The next prime is 121870129. The reversal of 121870122 is 221078121.

It is a junction number, because it is equal to n+sod(n) for n = 121870092 and 121870101.

It is not an unprimeable number, because it can be changed into a prime (121870129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77698 + ... + 79250.

It is an arithmetic number, because the mean of its divisors is an integer number (4405590).

Almost surely, 2^121870122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121870122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140978880).

121870122 is an abundant number, since it is smaller than the sum of its proper divisors (160087638).

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

121870122 is a wasteful number, since it uses less digits than its factorization.

121870122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 121870122 is about 11039.4801508042. The cubic root of 121870122 is about 495.7915058722.

The spelling of 121870122 in words is "one hundred twenty-one million, eight hundred seventy thousand, one hundred twenty-two".