21120221032 has 32 divisors (see below), whose sum is σ = 40287837600. Its totient is φ = 10376942400.

The previous prime is 21120221027. The next prime is 21120221041. The reversal of 21120221032 is 23012202112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120220997 and 21120221015.

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, 1394782 + ... + 1409842.

It is an arithmetic number, because the mean of its divisors is an integer number (1258994925).

Almost surely, 2^21120221032 is an apocalyptic number.

It is an amenable number.

21120221032 is a deficient number, since it is larger than the sum of its proper divisors (19167616568).

21120221032 is a wasteful number, since it uses less digits than its factorization.

21120221032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18097 (or 18093 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21120221032 its reverse (23012202112), we get a palindrome (44132423144).

The spelling of 21120221032 in words is "twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, thirty-two".