21151132097 has 16 divisors (see below), whose sum is σ = 23397776640. Its totient is φ = 19018002432.

The previous prime is 21151132043. The next prime is 21151132127. The reversal of 21151132097 is 79023115112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21151132097 - 2¹⁶ = 21151066561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21151132007) 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 15 ways as a sum of consecutive naturals, for example, 288929 + ... + 354657.

It is an arithmetic number, because the mean of its divisors is an integer number (1462361040).

Almost surely, 2^21151132097 is an apocalyptic number.

It is an amenable number.

21151132097 is a deficient number, since it is larger than the sum of its proper divisors (2246644543).

21151132097 is a wasteful number, since it uses less digits than its factorization.

21151132097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66592.

The product of its (nonzero) digits is 3780, while the sum is 32.

The spelling of 21151132097 in words is "twenty-one billion, one hundred fifty-one million, one hundred thirty-two thousand, ninety-seven".