1140121001 has 4 divisors (see below), whose sum is σ = 1161632772. Its totient is φ = 1118609232.

The previous prime is 1140120979. The next prime is 1140121009. The reversal of 1140121001 is 1001210411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1001210411 = 761 ⋅1315651.

It can be written as a sum of positive squares in 2 ways, for example, as 543589225 + 596531776 = 23315^2 + 24424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140121001 - 2⁶ = 1140120937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140121009) 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, 10755806 + ... + 10755911.

It is an arithmetic number, because the mean of its divisors is an integer number (290408193).

Almost surely, 2^1140121001 is an apocalyptic number.

It is an amenable number.

1140121001 is a deficient number, since it is larger than the sum of its proper divisors (21511771).

1140121001 is an equidigital number, since it uses as much as digits as its factorization.

1140121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21511770.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1140121001 is about 33765.6778548869. The cubic root of 1140121001 is about 1044.6808854445.

Adding to 1140121001 its reverse (1001210411), we get a palindrome (2141331412).

The spelling of 1140121001 in words is "one billion, one hundred forty million, one hundred twenty-one thousand, one".