121013154 has 24 divisors (see below), whose sum is σ = 263717532. Its totient is φ = 40103520.

The previous prime is 121013149. The next prime is 121013159. The reversal of 121013154 is 451310121.

It is an interprime number because it is at equal distance from previous prime (121013149) and next prime (121013159).

It can be written as a sum of positive squares in 2 ways, for example, as 97713225 + 23299929 = 9885^2 + 4827^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121013159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16317 + ... + 22544.

Almost surely, 2^121013154 is an apocalyptic number.

121013154 is an abundant number, since it is smaller than the sum of its proper divisors (142704378).

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

121013154 is a wasteful number, since it uses less digits than its factorization.

121013154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39042 (or 39039 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 121013154 is about 11000.5978928420. The cubic root of 121013154 is about 494.6266667703.

Adding to 121013154 its reverse (451310121), we get a palindrome (572323275).

The spelling of 121013154 in words is "one hundred twenty-one million, thirteen thousand, one hundred fifty-four".