21401125376176 has 80 divisors (see below), whose sum is σ = 51044139188224. Its totient is φ = 8464606417152.

The previous prime is 21401125376089. The next prime is 21401125376209. The reversal of 21401125376176 is 67167352110412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5427505 + ... + 8500591.

Almost surely, 2^{21401125376176} is an apocalyptic number.

21401125376176 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21401125376176 is an abundant number, since it is smaller than the sum of its proper divisors (29643013812048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21401125376176 is a wasteful number, since it uses less digits than its factorization.

21401125376176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077898 (or 3077892 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

Adding to 21401125376176 its reverse (67167352110412), we get a palindrome (88568477486588).

The spelling of 21401125376176 in words is "twenty-one trillion, four hundred one billion, one hundred twenty-five million, three hundred seventy-six thousand, one hundred seventy-six".