102120011220 has 48 divisors (see below), whose sum is σ = 288767098368. Its totient is φ = 26962377600.

The previous prime is 102120011099. The next prime is 102120011281. The reversal of 102120011220 is 22110021201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 102120011196 and 102120011205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8419684 + ... + 8431803.

It is an arithmetic number, because the mean of its divisors is an integer number (6015981216).

Almost surely, 2^102120011220 is an apocalyptic number.

102120011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102120011220 is an abundant number, since it is smaller than the sum of its proper divisors (186647087148).

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

102120011220 is a wasteful number, since it uses less digits than its factorization.

102120011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16851600 (or 16851598 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102120011220 its reverse (22110021201), we get a palindrome (124230032421).

The spelling of 102120011220 in words is "one hundred two billion, one hundred twenty million, eleven thousand, two hundred twenty".