102012211220 has 12 divisors (see below), whose sum is σ = 214225643604. Its totient is φ = 40804884480.

The previous prime is 102012211201. The next prime is 102012211229. The reversal of 102012211220 is 22112210201.

It can be written as a sum of positive squares in 2 ways, for example, as 39185786116 + 62826425104 = 197954^2 + 250652^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102012211195 and 102012211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012211229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550305261 + ... + 2550305300.

It is an arithmetic number, because the mean of its divisors is an integer number (17852136967).

Almost surely, 2^102012211220 is an apocalyptic number.

102012211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102012211220 is an abundant number, since it is smaller than the sum of its proper divisors (112213432384).

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

102012211220 is a wasteful number, since it uses less digits than its factorization.

102012211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100610570 (or 5100610568 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102012211220 its reverse (22112210201), we get a palindrome (124124421421).

The spelling of 102012211220 in words is "one hundred two billion, twelve million, two hundred eleven thousand, two hundred twenty".