221432111020 has 24 divisors (see below), whose sum is σ = 465020265024. Its totient is φ = 88570400256.

The previous prime is 221432110979. The next prime is 221432111041. The reversal of 221432111020 is 20111234122.

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, 708589 + ... + 972091.

It is an arithmetic number, because the mean of its divisors is an integer number (19375844376).

Almost surely, 2^221432111020 is an apocalyptic number.

221432111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221432111020 is an abundant number, since it is smaller than the sum of its proper divisors (243588154004).

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

221432111020 is a wasteful number, since it uses less digits than its factorization.

221432111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305529 (or 305527 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221432111020 its reverse (20111234122), we get a palindrome (241543345142).

The spelling of 221432111020 in words is "two hundred twenty-one billion, four hundred thirty-two million, one hundred eleven thousand, twenty".