221000010122 has 4 divisors (see below), whose sum is σ = 331500015186. Its totient is φ = 110500005060.

The previous prime is 221000010113. The next prime is 221000010131. The reversal of 221000010122 is 221010000122.

It is a happy number.

221000010122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (221000010113) and next prime (221000010131).

It can be written as a sum of positive squares in only one way, i.e., 189730807561 + 31269202561 = 435581^2 + 176831^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55250002529 + ... + 55250002532.

Almost surely, 2^221000010122 is an apocalyptic number.

221000010122 is a deficient number, since it is larger than the sum of its proper divisors (110500005064).

221000010122 is a wasteful number, since it uses less digits than its factorization.

221000010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110500005063.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221000010122 its reverse (221010000122), we get a palindrome (442010010244).

The spelling of 221000010122 in words is "two hundred twenty-one billion, ten thousand, one hundred twenty-two".