21421144104332 has 24 divisors (see below), whose sum is σ = 42842419620000. Its totient is φ = 9180462170880.

The previous prime is 21421144104329. The next prime is 21421144104343. The reversal of 21421144104332 is 23340144112412.

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, 9977282 + ... + 11932662.

It is an arithmetic number, because the mean of its divisors is an integer number (1785100817500).

Almost surely, 2^{21421144104332} is an apocalyptic number.

It is an amenable number.

21421144104332 is an abundant number, since it is smaller than the sum of its proper divisors (21421275515668).

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

21421144104332 is a wasteful number, since it uses less digits than its factorization.

21421144104332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346641 (or 2346639 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 21421144104332 its reverse (23340144112412), we get a palindrome (44761288216744).

The spelling of 21421144104332 in words is "twenty-one trillion, four hundred twenty-one billion, one hundred forty-four million, one hundred four thousand, three hundred thirty-two".