21011020202200 has 96 divisors (see below), whose sum is σ = 56371314504960. Its totient is φ = 7133838710400.

The previous prime is 21011020202191. The next prime is 21011020202231. The reversal of 21011020202200 is 220202011012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72709546 + ... + 72997945.

It is an arithmetic number, because the mean of its divisors is an integer number (587201192760).

Almost surely, 2^{21011020202200} is an apocalyptic number.

21011020202200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011020202200 is an abundant number, since it is smaller than the sum of its proper divisors (35360294302760).

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

21011020202200 is a wasteful number, since it uses less digits than its factorization.

21011020202200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145707617 (or 145707608 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21011020202200 its reverse (220202011012), we get a palindrome (21231222213212).

The spelling of 21011020202200 in words is "twenty-one trillion, eleven billion, twenty million, two hundred two thousand, two hundred".