221121012022 has 4 divisors (see below), whose sum is σ = 331681518036. Its totient is φ = 110560506010.

The previous prime is 221121012011. The next prime is 221121012023. The reversal of 221121012022 is 220210121122.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 221121011987 and 221121012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121012023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55280253004 + ... + 55280253007.

It is an arithmetic number, because the mean of its divisors is an integer number (82920379509).

Almost surely, 2^221121012022 is an apocalyptic number.

221121012022 is a deficient number, since it is larger than the sum of its proper divisors (110560506014).

221121012022 is a wasteful number, since it uses less digits than its factorization.

221121012022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110560506013.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221121012022 its reverse (220210121122), we get a palindrome (441331133144).

The spelling of 221121012022 in words is "two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, twenty-two".