121010158 has 4 divisors (see below), whose sum is σ = 181515240. Its totient is φ = 60505078.

The previous prime is 121010137. The next prime is 121010159. The reversal of 121010158 is 851010121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851010121 = 13 ⋅65462317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30252538 + ... + 30252541.

It is an arithmetic number, because the mean of its divisors is an integer number (45378810).

Almost surely, 2^121010158 is an apocalyptic number.

121010158 is a deficient number, since it is larger than the sum of its proper divisors (60505082).

121010158 is an equidigital number, since it uses as much as digits as its factorization.

121010158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60505081.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 121010158 is about 11000.4617175826. The cubic root of 121010158 is about 494.6225848071.

Adding to 121010158 its reverse (851010121), we get a palindrome (972020279).

The spelling of 121010158 in words is "one hundred twenty-one million, ten thousand, one hundred fifty-eight".