121000143 has 16 divisors (see below), whose sum is σ = 180294912. Its totient is φ = 71544000.

The previous prime is 121000133. The next prime is 121000147. The reversal of 121000143 is 341000121.

It is a happy number.

It is not a de Polignac number, because 121000143 - 2⁴ = 121000127 is a prime.

121000143 is a modest number, since divided by 143 gives 121 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000147) 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, 43363 + ... + 46068.

It is an arithmetic number, because the mean of its divisors is an integer number (11268432).

Almost surely, 2^121000143 is an apocalyptic number.

121000143 is a deficient number, since it is larger than the sum of its proper divisors (59294769).

121000143 is a wasteful number, since it uses less digits than its factorization.

121000143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89486.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121000143 is about 11000.0064999981. The cubic root of 121000143 is about 494.6089391707.

Adding to 121000143 its reverse (341000121), we get a palindrome (462000264).

The spelling of 121000143 in words is "one hundred twenty-one million, one hundred forty-three", and thus it is an aban number.