221111220002 has 4 divisors (see below), whose sum is σ = 331666830006. Its totient is φ = 110555610000.

The previous prime is 221111219971. The next prime is 221111220013. The reversal of 221111220002 is 200022111122.

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., 201339766681 + 19771453321 = 448709^2 + 140611^2 .

It is a super-2 number, since 2×221111220002² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55277804999 + ... + 55277805002.

Almost surely, 2^221111220002 is an apocalyptic number.

221111220002 is a deficient number, since it is larger than the sum of its proper divisors (110555610004).

221111220002 is a wasteful number, since it uses less digits than its factorization.

221111220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110555610003.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221111220002 its reverse (200022111122), we get a palindrome (421133331124).

The spelling of 221111220002 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, two".