21101220032 has 28 divisors (see below), whose sum is σ = 44076564120. Its totient is φ = 9995314176.

The previous prime is 21101220017. The next prime is 21101220043. The reversal of 21101220032 is 23002210112.

It is a happy number.

It is a super-2 number, since 2×21101220032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101219989 and 21101220016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8675273 + ... + 8677704.

Almost surely, 2^21101220032 is an apocalyptic number.

It is an amenable number.

21101220032 is an abundant number, since it is smaller than the sum of its proper divisors (22975344088).

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

21101220032 is a wasteful number, since it uses less digits than its factorization.

21101220032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17353008 (or 17352998 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21101220032 its reverse (23002210112), we get a palindrome (44103430144).

The spelling of 21101220032 in words is "twenty-one billion, one hundred one million, two hundred twenty thousand, thirty-two".