10202421420020 has 96 divisors (see below), whose sum is σ = 22170110054400. Its totient is φ = 3940766968320.

The previous prime is 10202421420019. The next prime is 10202421420031. The reversal of 10202421420020 is 2002412420201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 10202421419974 and 10202421420001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135692477 + ... + 135767643.

It is an arithmetic number, because the mean of its divisors is an integer number (230938646400).

Almost surely, 2^{10202421420020} is an apocalyptic number.

10202421420020 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 10202421420020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11085055027200).

10202421420020 is an abundant number, since it is smaller than the sum of its proper divisors (11967688634380).

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

10202421420020 is a wasteful number, since it uses less digits than its factorization.

10202421420020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76593 (or 76591 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 10202421420020 its reverse (2002412420201), we get a palindrome (12204833840221).

The spelling of 10202421420020 in words is "ten trillion, two hundred two billion, four hundred twenty-one million, four hundred twenty thousand, twenty".