121001143 has 4 divisors (see below), whose sum is σ = 121615560. Its totient is φ = 120386728.

The previous prime is 121001141. The next prime is 121001161. The reversal of 121001143 is 341100121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121001143 - 2¹ = 121001141 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 (121001141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306913 + ... + 307306.

It is an arithmetic number, because the mean of its divisors is an integer number (30403890).

Almost surely, 2^121001143 is an apocalyptic number.

121001143 is a deficient number, since it is larger than the sum of its proper divisors (614417).

121001143 is an equidigital number, since it uses as much as digits as its factorization.

121001143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614416.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121001143 is about 11000.0519544228. The cubic root of 121001143 is about 494.6103017244.

Adding to 121001143 its reverse (341100121), we get a palindrome (462101264).

The spelling of 121001143 in words is "one hundred twenty-one million, one thousand, one hundred forty-three".