21101301020 has 12 divisors (see below), whose sum is σ = 44312732184. Its totient is φ = 8440520400.

The previous prime is 21101300993. The next prime is 21101301037. The reversal of 21101301020 is 2010310112.

It is a junction number, because it is equal to n+sod(n) for n = 21101300992 and 21101301010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527532506 + ... + 527532545.

It is an arithmetic number, because the mean of its divisors is an integer number (3692727682).

Almost surely, 2^21101301020 is an apocalyptic number.

21101301020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101301020 is an abundant number, since it is smaller than the sum of its proper divisors (23211431164).

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

21101301020 is a wasteful number, since it uses less digits than its factorization.

21101301020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055065060 (or 1055065058 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21101301020 its reverse (2010310112), we get a palindrome (23111611132).

The spelling of 21101301020 in words is "twenty-one billion, one hundred one million, three hundred one thousand, twenty".