102201321020 has 48 divisors (see below), whose sum is σ = 218488596480. Its totient is φ = 40145630784.

The previous prime is 102201320993. The next prime is 102201321029. The reversal of 102201321020 is 20123102201.

It is a happy number.

It is a super-2 number, since 2×102201321020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102201320986 and 102201321004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201321029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096277 + ... + 1185843.

It is an arithmetic number, because the mean of its divisors is an integer number (4551845760).

Almost surely, 2^102201321020 is an apocalyptic number.

102201321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102201321020 is an abundant number, since it is smaller than the sum of its proper divisors (116287275460).

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

102201321020 is a wasteful number, since it uses less digits than its factorization.

102201321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90602 (or 90600 counting only the distinct ones).

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

Adding to 102201321020 its reverse (20123102201), we get a palindrome (122324423221).

The spelling of 102201321020 in words is "one hundred two billion, two hundred one million, three hundred twenty-one thousand, twenty".