21231022020000 has 240 divisors, whose sum is σ = 74999077987680. Its totient is φ = 5226097536000.

The previous prime is 21231022019989. The next prime is 21231022020011. The reversal of 21231022020000 is 2022013212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21231022019989) and next prime (21231022020011).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12829630 + ... + 14389629.

It is an arithmetic number, because the mean of its divisors is an integer number (312496158282).

Almost surely, 2^{21231022020000} is an apocalyptic number.

21231022020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21231022020000 is an abundant number, since it is smaller than the sum of its proper divisors (53768055967680).

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

21231022020000 is a wasteful number, since it uses less digits than its factorization.

21231022020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27219305 (or 27219282 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21231022020000 its reverse (2022013212), we get a palindrome (21233044033212).

The spelling of 21231022020000 in words is "twenty-one trillion, two hundred thirty-one billion, twenty-two million, twenty thousand".