21002220030000 has 200 divisors, whose sum is σ = 73961419219776. Its totient is φ = 5091447200000.

The previous prime is 21002220029983. The next prime is 21002220030013. The reversal of 21002220030000 is 3002220012.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 31491546 + ... + 32151545.

Almost surely, 2^{21002220030000} is an apocalyptic number.

21002220030000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002220030000 is an abundant number, since it is smaller than the sum of its proper divisors (52959199189776).

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

21002220030000 is a wasteful number, since it uses less digits than its factorization.

21002220030000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63643133 (or 63643112 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21002220030000 its reverse (3002220012), we get a palindrome (21005222250012).

The spelling of 21002220030000 in words is "twenty-one trillion, two billion, two hundred twenty million, thirty thousand".