102011243220 has 72 divisors (see below), whose sum is σ = 309961570464. Its totient is φ = 27156627648.

The previous prime is 102011243207. The next prime is 102011243237. The reversal of 102011243220 is 22342110201.

It is a happy number.

102011243220 is a `hidden beast` number, since 1 + 0 + 201 + 1 + 243 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102011243193 and 102011243202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 377074 + ... + 588393.

It is an arithmetic number, because the mean of its divisors is an integer number (4305021812).

Almost surely, 2^102011243220 is an apocalyptic number.

102011243220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102011243220 is an abundant number, since it is smaller than the sum of its proper divisors (207950327244).

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

102011243220 is a wasteful number, since it uses less digits than its factorization.

102011243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966069 (or 966064 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 102011243220 its reverse (22342110201), we get a palindrome (124353353421).

The spelling of 102011243220 in words is "one hundred two billion, eleven million, two hundred forty-three thousand, two hundred twenty".