21411231044 has 24 divisors (see below), whose sum is σ = 43039846080. Its totient is φ = 9129659616.

The previous prime is 21411230983. The next prime is 21411231067. The reversal of 21411231044 is 44013211412.

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, 1935314 + ... + 1946345.

It is an arithmetic number, because the mean of its divisors is an integer number (1793326920).

Almost surely, 2^21411231044 is an apocalyptic number.

It is an amenable number.

21411231044 is an abundant number, since it is smaller than the sum of its proper divisors (21628615036).

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

21411231044 is a wasteful number, since it uses less digits than its factorization.

21411231044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881867 (or 3881865 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21411231044 its reverse (44013211412), we get a palindrome (65424442456).

The spelling of 21411231044 in words is "twenty-one billion, four hundred eleven million, two hundred thirty-one thousand, forty-four".