121013143 has 16 divisors (see below), whose sum is σ = 131244480. Its totient is φ = 111234816.

The previous prime is 121013141. The next prime is 121013149. The reversal of 121013143 is 341310121.

It is a cyclic number.

It is not a de Polignac number, because 121013143 - 2¹ = 121013141 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 (121013141) 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, 264571 + ... + 265027.

It is an arithmetic number, because the mean of its divisors is an integer number (8202780).

Almost surely, 2^121013143 is an apocalyptic number.

121013143 is a deficient number, since it is larger than the sum of its proper divisors (10231337).

121013143 is a wasteful number, since it uses less digits than its factorization.

121013143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 121013143 is about 11000.5973928692. The cubic root of 121013143 is about 494.6266517832.

Adding to 121013143 its reverse (341310121), we get a palindrome (462323264).

The spelling of 121013143 in words is "one hundred twenty-one million, thirteen thousand, one hundred forty-three".