221211021022 has 4 divisors (see below), whose sum is σ = 331816531536. Its totient is φ = 110605510510.

The previous prime is 221211021013. The next prime is 221211021091. The reversal of 221211021022 is 220120112122.

It is a happy number.

221211021022 is digitally balanced in base 2, 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 a junction number, because it is equal to n+sod(n) for n = 221211020987 and 221211021005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55302755254 + ... + 55302755257.

It is an arithmetic number, because the mean of its divisors is an integer number (82954132884).

Almost surely, 2^221211021022 is an apocalyptic number.

221211021022 is a deficient number, since it is larger than the sum of its proper divisors (110605510514).

221211021022 is a wasteful number, since it uses less digits than its factorization.

221211021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110605510513.

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

Adding to 221211021022 its reverse (220120112122), we get a palindrome (441331133144).

The spelling of 221211021022 in words is "two hundred twenty-one billion, two hundred eleven million, twenty-one thousand, twenty-two".