21030000011020 has 96 divisors (see below), whose sum is σ = 59295776311296. Its totient is φ = 6050589408000.

The previous prime is 21030000010933. The next prime is 21030000011023. The reversal of 21030000011020 is 2011000003012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 21030000010988 and 21030000011006.

It is not an unprimeable number, because it can be changed into a prime (21030000011023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 525204756 + ... + 525244795.

It is an arithmetic number, because the mean of its divisors is an integer number (617664336576).

Almost surely, 2^{21030000011020} is an apocalyptic number.

21030000011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030000011020 is an abundant number, since it is smaller than the sum of its proper divisors (38265776300276).

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

21030000011020 is a wasteful number, since it uses less digits than its factorization.

21030000011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050449591 (or 1050449589 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21030000011020 its reverse (2011000003012), we get a palindrome (23041000014032).

The spelling of 21030000011020 in words is "twenty-one trillion, thirty billion, eleven thousand, twenty".