21030222222100 has 288 divisors, whose sum is σ = 57251649159936. Its totient is φ = 6527283609600.

The previous prime is 21030222222043. The next prime is 21030222222169. The reversal of 21030222222100 is 122222203012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1281462895 + ... + 1281479305.

It is an arithmetic number, because the mean of its divisors is an integer number (198790448472).

Almost surely, 2^{21030222222100} is an apocalyptic number.

21030222222100 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 21030222222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28625824579968).

21030222222100 is an abundant number, since it is smaller than the sum of its proper divisors (36221426937836).

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

21030222222100 is a wasteful number, since it uses less digits than its factorization.

21030222222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19155 (or 19148 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21030222222100 its reverse (122222203012), we get a palindrome (21152444425112).

The spelling of 21030222222100 in words is "twenty-one trillion, thirty billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred".