21621222143010 has 192 divisors, whose sum is σ = 66035589984000. Its totient is φ = 4905919726848.

The previous prime is 21621222142991. The next prime is 21621222143093. The reversal of 21621222143010 is 1034122212612.

21621222143010 is a `hidden beast` number, since 2 + 1 + 6 + 2 + 1 + 2 + 221 + 430 + 1 + 0 = 666.

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, 1673001 + ... + 6785379.

It is an arithmetic number, because the mean of its divisors is an integer number (343935364500).

Almost surely, 2^{21621222143010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21621222143010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33017794992000).

21621222143010 is an abundant number, since it is smaller than the sum of its proper divisors (44414367840990).

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

21621222143010 is a wasteful number, since it uses less digits than its factorization.

21621222143010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112550 (or 5112533 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 21621222143010 its reverse (1034122212612), we get a palindrome (22655344355622).

The spelling of 21621222143010 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred twenty-two million, one hundred forty-three thousand, ten".