221121200022102 has 96 divisors (see below), whose sum is σ = 494069318206464. Its totient is φ = 71420264136000.

The previous prime is 221121200022089. The next prime is 221121200022127. The reversal of 221121200022102 is 201220002121122.

It is a happy number.

221121200022102 is a `hidden beast` number, since 221 + 1 + 21 + 200 + 0 + 221 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 238963227 + ... + 239886777.

It is an arithmetic number, because the mean of its divisors is an integer number (5146555397984).

Almost surely, 2^{221121200022102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221121200022102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247034659103232).

221121200022102 is an abundant number, since it is smaller than the sum of its proper divisors (272948118184362).

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

221121200022102 is a wasteful number, since it uses less digits than its factorization.

221121200022102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925074 (or 925071 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221121200022102 its reverse (201220002121122), we get a palindrome (422341202143224).

The spelling of 221121200022102 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred million, twenty-two thousand, one hundred two".