1151344021 has 4 divisors (see below), whose sum is σ = 1156161600. Its totient is φ = 1146526444.

The previous prime is 1151343983. The next prime is 1151344031. The reversal of 1151344021 is 1204431511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1204431511 = 37 ⋅32552203.

It is a cyclic number.

It is not a de Polignac number, because 1151344021 - 2¹⁷ = 1151212949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1151343983 and 1151344001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151344031) 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, 2408431 + ... + 2408908.

It is an arithmetic number, because the mean of its divisors is an integer number (289040400).

Almost surely, 2^1151344021 is an apocalyptic number.

It is an amenable number.

1151344021 is a deficient number, since it is larger than the sum of its proper divisors (4817579).

1151344021 is an equidigital number, since it uses as much as digits as its factorization.

1151344021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4817578.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1151344021 is about 33931.4606375853. The cubic root of 1151344021 is about 1048.0975440571.

Adding to 1151344021 its reverse (1204431511), we get a palindrome (2355775532).

The spelling of 1151344021 in words is "one billion, one hundred fifty-one million, three hundred forty-four thousand, twenty-one".