32120221221 has 80 divisors (see below), whose sum is σ = 55182853440. Its totient is φ = 18414190080.

The previous prime is 32120221207. The next prime is 32120221267. The reversal of 32120221221 is 12212202123.

It is not a de Polignac number, because 32120221221 - 2¹³ = 32120213029 is a prime.

It is a super-2 number, since 2×32120221221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 32120221194 and 32120221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32120221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 17148141 + ... + 17150013.

It is an arithmetic number, because the mean of its divisors is an integer number (689785668).

Almost surely, 2^32120221221 is an apocalyptic number.

It is an amenable number.

32120221221 is a deficient number, since it is larger than the sum of its proper divisors (23062632219).

32120221221 is a wasteful number, since it uses less digits than its factorization.

32120221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928 (or 2919 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 32120221221 its reverse (12212202123), we get a palindrome (44332423344).

The spelling of 32120221221 in words is "thirty-two billion, one hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".