102020121320 has 32 divisors (see below), whose sum is σ = 247202602920. Its totient is φ = 37668967680.

The previous prime is 102020121317. The next prime is 102020121331. The reversal of 102020121320 is 23121020201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55727156356 + 46292964964 = 236066^2 + 215158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102020121295 and 102020121304.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 98095751 + ... + 98096790.

Almost surely, 2^102020121320 is an apocalyptic number.

102020121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102020121320 is an abundant number, since it is smaller than the sum of its proper divisors (145182481600).

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

102020121320 is a wasteful number, since it uses less digits than its factorization.

102020121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196192565 (or 196192561 counting only the distinct ones).

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

Adding to 102020121320 its reverse (23121020201), we get a palindrome (125141141521).

The spelling of 102020121320 in words is "one hundred two billion, twenty million, one hundred twenty-one thousand, three hundred twenty".