221101021002002 has 4 divisors (see below), whose sum is σ = 331651531503006. Its totient is φ = 110550510501000.

The previous prime is 221101021001999. The next prime is 221101021002109. The reversal of 221101021002002 is 200200120101122.

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., 146560780600441 + 74540240401561 = 12106229^2 + 8633669^2 .

It is a super-2 number, since 2×221101021002002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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, 55275255250499 + ... + 55275255250502.

Almost surely, 2^{221101021002002} is an apocalyptic number.

221101021002002 is a deficient number, since it is larger than the sum of its proper divisors (110550510501004).

221101021002002 is a wasteful number, since it uses less digits than its factorization.

221101021002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110550510501003.

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

Adding to 221101021002002 its reverse (200200120101122), we get a palindrome (421301141103124).

The spelling of 221101021002002 in words is "two hundred twenty-one trillion, one hundred one billion, twenty-one million, two thousand, two".