21023201000020 has 24 divisors (see below), whose sum is σ = 44275951861344. Its totient is φ = 8385046159776.

The previous prime is 21023200999987. The next prime is 21023201000023. The reversal of 21023201000020 is 2000010232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023201000023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1514632902 + ... + 1514646781.

It is an arithmetic number, because the mean of its divisors is an integer number (1844831327556).

Almost surely, 2^{21023201000020} is an apocalyptic number.

21023201000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023201000020 is an abundant number, since it is smaller than the sum of its proper divisors (23252750861324).

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

21023201000020 is a wasteful number, since it uses less digits than its factorization.

21023201000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029280039 (or 3029280037 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21023201000020 its reverse (2000010232012), we get a palindrome (23023211232032).

The spelling of 21023201000020 in words is "twenty-one trillion, twenty-three billion, two hundred one million, twenty", and thus it is an aban number.