102311212290 has 128 divisors (see below), whose sum is σ = 286660435968. Its totient is φ = 22887298560.

The previous prime is 102311212259. The next prime is 102311212291. The reversal of 102311212290 is 92212113201.

It is a self number, because there is not a number n which added to its sum of digits gives 102311212290.

It is not an unprimeable number, because it can be changed into a prime (102311212291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2017627 + ... + 2067713.

It is an arithmetic number, because the mean of its divisors is an integer number (2239534656).

Almost surely, 2^102311212290 is an apocalyptic number.

102311212290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102311212290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143330217984).

102311212290 is an abundant number, since it is smaller than the sum of its proper divisors (184349223678).

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

102311212290 is a wasteful number, since it uses less digits than its factorization.

102311212290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50312.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 102311212290 its reverse (92212113201), we get a palindrome (194523325491).

The spelling of 102311212290 in words is "one hundred two billion, three hundred eleven million, two hundred twelve thousand, two hundred ninety".