21120132104 has 32 divisors (see below), whose sum is σ = 43282252800. Its totient is φ = 9618274560.

The previous prime is 21120132037. The next prime is 21120132107. The reversal of 21120132104 is 40123102112.

It is a super-2 number, since 2×21120132104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (21120132107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2500544 + ... + 2508975.

It is an arithmetic number, because the mean of its divisors is an integer number (1352570400).

Almost surely, 2^21120132104 is an apocalyptic number.

It is an amenable number.

21120132104 is an abundant number, since it is smaller than the sum of its proper divisors (22162120696).

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

21120132104 is a wasteful number, since it uses less digits than its factorization.

21120132104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009573 (or 5009569 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21120132104 its reverse (40123102112), we get a palindrome (61243234216).

The spelling of 21120132104 in words is "twenty-one billion, one hundred twenty million, one hundred thirty-two thousand, one hundred four".