21211123432 has 16 divisors (see below), whose sum is σ = 40250024640. Its totient is φ = 10477783536.

The previous prime is 21211123399. The next prime is 21211123433. The reversal of 21211123432 is 23432111212.

It is not an unprimeable number, because it can be changed into a prime (21211123433) 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, 15971568 + ... + 15972895.

It is an arithmetic number, because the mean of its divisors is an integer number (2515626540).

Almost surely, 2^21211123432 is an apocalyptic number.

It is an amenable number.

21211123432 is a deficient number, since it is larger than the sum of its proper divisors (19038901208).

21211123432 is a wasteful number, since it uses less digits than its factorization.

21211123432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31944552 (or 31944548 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

Adding to 21211123432 its reverse (23432111212), we get a palindrome (44643234644).

The spelling of 21211123432 in words is "twenty-one billion, two hundred eleven million, one hundred twenty-three thousand, four hundred thirty-two".