221020223102122 has 4 divisors (see below), whose sum is σ = 331530334653186. Its totient is φ = 110510111551060.

The previous prime is 221020223102101. The next prime is 221020223102191. The reversal of 221020223102122 is 221201322020122.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 169212200569281 + 51808022532841 = 13008159^2 + 7197779^2 .

It is a super-2 number, since 2×221020223102122² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221020223102093 and 221020223102102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255055775529 + ... + 55255055775532.

Almost surely, 2^{221020223102122} is an apocalyptic number.

221020223102122 is a deficient number, since it is larger than the sum of its proper divisors (110510111551064).

221020223102122 is a wasteful number, since it uses less digits than its factorization.

221020223102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110510111551063.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221020223102122 its reverse (221201322020122), we get a palindrome (442221545122244).

The spelling of 221020223102122 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-three million, one hundred two thousand, one hundred twenty-two".