102001122221020 has 48 divisors (see below), whose sum is σ = 234285416644608. Its totient is φ = 36994472970560.

The previous prime is 102001122220997. The next prime is 102001122221059. The reversal of 102001122221020 is 20122221100201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102001122220985 and 102001122221003.

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, 605191804 + ... + 605360323.

It is an arithmetic number, because the mean of its divisors is an integer number (4880946180096).

Almost surely, 2^{102001122221020} is an apocalyptic number.

102001122221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001122221020 is an abundant number, since it is smaller than the sum of its proper divisors (132284294423588).

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

102001122221020 is a wasteful number, since it uses less digits than its factorization.

102001122221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210552530 (or 1210552528 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102001122221020 its reverse (20122221100201), we get a palindrome (122123343321221).

The spelling of 102001122221020 in words is "one hundred two trillion, one billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty".