21161004001412 has 12 divisors (see below), whose sum is σ = 40398280366416. Its totient is φ = 9618638182440.

The previous prime is 21161004001411. The next prime is 21161004001421. The reversal of 21161004001412 is 21410040016112.

It is not an unprimeable number, because it can be changed into a prime (21161004001411) 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, 240465954518 + ... + 240465954605.

It is an arithmetic number, because the mean of its divisors is an integer number (3366523363868).

Almost surely, 2^{21161004001412} is an apocalyptic number.

21161004001412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21161004001412 is a deficient number, since it is larger than the sum of its proper divisors (19237276365004).

21161004001412 is a wasteful number, since it uses less digits than its factorization.

21161004001412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480931909138 (or 480931909136 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 21161004001412 its reverse (21410040016112), we get a palindrome (42571044017524).

The spelling of 21161004001412 in words is "twenty-one trillion, one hundred sixty-one billion, four million, one thousand, four hundred twelve".