102111311020 has 24 divisors (see below), whose sum is σ = 214462731168. Its totient is φ = 40839004800.

The previous prime is 102111311011. The next prime is 102111311023. The reversal of 102111311020 is 20113111201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (102111311023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191616 + ... + 490855.

It is an arithmetic number, because the mean of its divisors is an integer number (8935947132).

Almost surely, 2^102111311020 is an apocalyptic number.

102111311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111311020 is an abundant number, since it is smaller than the sum of its proper divisors (112351420148).

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

102111311020 is a wasteful number, since it uses less digits than its factorization.

102111311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689961 (or 689959 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 102111311020 its reverse (20113111201), we get a palindrome (122224422221).

It can be divided in two parts, 10211 and 1311020, that added together give a palindrome (1321231).

The spelling of 102111311020 in words is "one hundred two billion, one hundred eleven million, three hundred eleven thousand, twenty".