1151173021 has 8 divisors (see below), whose sum is σ = 1176367104. Its totient is φ = 1126008240.

The previous prime is 1151173019. The next prime is 1151173027. The reversal of 1151173021 is 1203711511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1151173021 - 2¹ = 1151173019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1151172983 and 1151173001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151173027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84516 + ... + 97186.

It is an arithmetic number, because the mean of its divisors is an integer number (147045888).

Almost surely, 2^1151173021 is an apocalyptic number.

It is an amenable number.

1151173021 is a deficient number, since it is larger than the sum of its proper divisors (25194083).

1151173021 is a wasteful number, since it uses less digits than its factorization.

1151173021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14651.

The product of its (nonzero) digits is 210, while the sum is 22.

The square root of 1151173021 is about 33928.9407585913. The cubic root of 1151173021 is about 1048.0456529483.

Adding to 1151173021 its reverse (1203711511), we get a palindrome (2354884532).

The spelling of 1151173021 in words is "one billion, one hundred fifty-one million, one hundred seventy-three thousand, twenty-one".