1201441511 has 4 divisors (see below), whose sum is σ = 1202719224. Its totient is φ = 1200163800.

The previous prime is 1201441489. The next prime is 1201441523. The reversal of 1201441511 is 1151441021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1151441021 = 19 ⋅60602159.

It is a cyclic number.

It is not a de Polignac number, because 1201441511 - 2⁶ = 1201441447 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 (1201441531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637445 + ... + 639326.

It is an arithmetic number, because the mean of its divisors is an integer number (300679806).

Almost surely, 2^1201441511 is an apocalyptic number.

1201441511 is a deficient number, since it is larger than the sum of its proper divisors (1277713).

1201441511 is an equidigital number, since it uses as much as digits as its factorization.

1201441511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277712.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 1201441511 is about 34661.8163257496. The cubic root of 1201441511 is about 1063.0839083629.

Adding to 1201441511 its reverse (1151441021), we get a palindrome (2352882532).

The spelling of 1201441511 in words is "one billion, two hundred one million, four hundred forty-one thousand, five hundred eleven".