2001121753 has 2 divisors, whose sum is σ = 2001121754. Its totient is φ = 2001121752.

The previous prime is 2001121751. The next prime is 2001121757. The reversal of 2001121753 is 3571211002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1526230489 + 474891264 = 39067^2 + 21792^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001121753 - 2¹ = 2001121751 is a prime.

Together with 2001121751, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2001121751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000560876 + 1000560877.

It is an arithmetic number, because the mean of its divisors is an integer number (1000560877).

Almost surely, 2^2001121753 is an apocalyptic number.

It is an amenable number.

2001121753 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001121753 is an equidigital number, since it uses as much as digits as its factorization.

2001121753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 2001121753 is about 44733.8993717293. The cubic root of 2001121753 is about 1260.1565592394.

Adding to 2001121753 its reverse (3571211002), we get a palindrome (5572332755).

The spelling of 2001121753 in words is "two billion, one million, one hundred twenty-one thousand, seven hundred fifty-three".