21111202210000 has 800 divisors, whose sum is σ = 61901445196800. Its totient is φ = 6819671040000.

The previous prime is 21111202209961. The next prime is 21111202210019. The reversal of 21111202210000 is 1220211112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 25714009590 + ... + 25714010410.

It is an arithmetic number, because the mean of its divisors is an integer number (77376806496).

Almost surely, 2^{21111202210000} is an apocalyptic number.

21111202210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21111202210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30950722598400).

21111202210000 is an abundant number, since it is smaller than the sum of its proper divisors (40790242986800).

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

21111202210000 is a wasteful number, since it uses less digits than its factorization.

21111202210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21111202210000 its reverse (1220211112), we get a palindrome (21112422421112).

The spelling of 21111202210000 in words is "twenty-one trillion, one hundred eleven billion, two hundred two million, two hundred ten thousand".