121513143 has 16 divisors (see below), whose sum is σ = 168890240. Its totient is φ = 77638176.

The previous prime is 121513057. The next prime is 121513187. The reversal of 121513143 is 341315121.

It is not a de Polignac number, because 121513143 - 2¹⁷ = 121382071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121513193) 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, 733 + ... + 15606.

It is an arithmetic number, because the mean of its divisors is an integer number (10555640).

Almost surely, 2^121513143 is an apocalyptic number.

121513143 is a deficient number, since it is larger than the sum of its proper divisors (47377097).

121513143 is a wasteful number, since it uses less digits than its factorization.

121513143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16446.

The product of its digits is 360, while the sum is 21.

The square root of 121513143 is about 11023.3000049894. The cubic root of 121513143 is about 495.3069456326.

Adding to 121513143 its reverse (341315121), we get a palindrome (462828264).

The spelling of 121513143 in words is "one hundred twenty-one million, five hundred thirteen thousand, one hundred forty-three".