102111221530 has 32 divisors (see below), whose sum is σ = 187580940480. Its totient is φ = 40009253760.

The previous prime is 102111221503. The next prime is 102111221533. The reversal of 102111221530 is 35122111201.

102111221530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 102111221498 and 102111221507.

It is not an unprimeable number, because it can be changed into a prime (102111221533) 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, 142164 + ... + 473743.

It is an arithmetic number, because the mean of its divisors is an integer number (5861904390).

Almost surely, 2^102111221530 is an apocalyptic number.

102111221530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102111221530 is a deficient number, since it is larger than the sum of its proper divisors (85469718950).

102111221530 is a wasteful number, since it uses less digits than its factorization.

102111221530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616254.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 102111221530 its reverse (35122111201), we get a palindrome (137233332731).

The spelling of 102111221530 in words is "one hundred two billion, one hundred eleven million, two hundred twenty-one thousand, five hundred thirty".