102321201220 has 96 divisors (see below), whose sum is σ = 263771424000. Its totient is φ = 33235114752.

The previous prime is 102321201197. The next prime is 102321201287. The reversal of 102321201220 is 22102123201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102321201194 and 102321201203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262177 + ... + 522856.

It is an arithmetic number, because the mean of its divisors is an integer number (2747619000).

Almost surely, 2^102321201220 is an apocalyptic number.

102321201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102321201220 is an abundant number, since it is smaller than the sum of its proper divisors (161450222780).

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

102321201220 is a wasteful number, since it uses less digits than its factorization.

102321201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785082 (or 785066 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 102321201220 its reverse (22102123201), we get a palindrome (124423324421).

The spelling of 102321201220 in words is "one hundred two billion, three hundred twenty-one million, two hundred one thousand, two hundred twenty".