102001220110020 has 384 divisors, whose sum is σ = 359407855521792. Its totient is φ = 20997704908800.

The previous prime is 102001220110007. The next prime is 102001220110073. The reversal of 102001220110020 is 20011022100201.

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 = 102001220109978 and 102001220110005.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 214652727 + ... + 215127393.

It is an arithmetic number, because the mean of its divisors is an integer number (935957957088).

Almost surely, 2^{102001220110020} is an apocalyptic number.

102001220110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102001220110020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179703927760896).

102001220110020 is an abundant number, since it is smaller than the sum of its proper divisors (257406635411772).

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

102001220110020 is a wasteful number, since it uses less digits than its factorization.

102001220110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475131 (or 475129 counting only the distinct ones).

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

Adding to 102001220110020 its reverse (20011022100201), we get a palindrome (122012242210221).

The spelling of 102001220110020 in words is "one hundred two trillion, one billion, two hundred twenty million, one hundred ten thousand, twenty".