1151441021 has 4 divisors (see below), whose sum is σ = 1212043200. Its totient is φ = 1090838844.

The previous prime is 1151440993. The next prime is 1151441033. The reversal of 1151441021 is 1201441511.

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: 1201441511 = 941 ⋅1276771.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1151441021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1151440984 and 1151441002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151441051) 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, 30301061 + ... + 30301098.

It is an arithmetic number, because the mean of its divisors is an integer number (303010800).

Almost surely, 2^1151441021 is an apocalyptic number.

It is an amenable number.

1151441021 is a deficient number, since it is larger than the sum of its proper divisors (60602179).

1151441021 is an equidigital number, since it uses as much as digits as its factorization.

1151441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60602178.

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

The square root of 1151441021 is about 33932.8899594479. The cubic root of 1151441021 is about 1048.1269770806.

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

The spelling of 1151441021 in words is "one billion, one hundred fifty-one million, four hundred forty-one thousand, twenty-one".