21160521331466 has 16 divisors (see below), whose sum is σ = 34627175358048. Its totient is φ = 9618177752400.

The previous prime is 21160521331427. The next prime is 21160521331471. The reversal of 21160521331466 is 66413312506112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11152385 + ... + 12911108.

It is an arithmetic number, because the mean of its divisors is an integer number (2164198459878).

Almost surely, 2^{21160521331466} is an apocalyptic number.

21160521331466 is a deficient number, since it is larger than the sum of its proper divisors (13466654026582).

21160521331466 is a wasteful number, since it uses less digits than its factorization.

21160521331466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24103477.

The product of its (nonzero) digits is 155520, while the sum is 41.

Adding to 21160521331466 its reverse (66413312506112), we get a palindrome (87573833837578).

The spelling of 21160521331466 in words is "twenty-one trillion, one hundred sixty billion, five hundred twenty-one million, three hundred thirty-one thousand, four hundred sixty-six".