20011221032 has 48 divisors (see below), whose sum is σ = 41264260800. Its totient is φ = 9091130400.

The previous prime is 20011221023. The next prime is 20011221037. The reversal of 20011221032 is 23012211002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20011220998 and 20011221016.

It is not an unprimeable number, because it can be changed into a prime (20011221037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2290769 + ... + 2299487.

It is an arithmetic number, because the mean of its divisors is an integer number (859672100).

Almost surely, 2^20011221032 is an apocalyptic number.

20011221032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20011221032 is an abundant number, since it is smaller than the sum of its proper divisors (21253039768).

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

20011221032 is a wasteful number, since it uses less digits than its factorization.

20011221032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11118 (or 11103 counting only the distinct ones).

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

Adding to 20011221032 its reverse (23012211002), we get a palindrome (43023432034).

The spelling of 20011221032 in words is "twenty billion, eleven million, two hundred twenty-one thousand, thirty-two".