221121202011 has 8 divisors (see below), whose sum is σ = 302796601104. Its totient is φ = 143429968800.

The previous prime is 221121202007. The next prime is 221121202039. The reversal of 221121202011 is 110202121122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221121202011 - 2² = 221121202007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221121202111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996041340 + ... + 996041561.

It is an arithmetic number, because the mean of its divisors is an integer number (37849575138).

Almost surely, 2^221121202011 is an apocalyptic number.

221121202011 is a deficient number, since it is larger than the sum of its proper divisors (81675399093).

221121202011 is a wasteful number, since it uses less digits than its factorization.

221121202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992082941.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221121202011 its reverse (110202121122), we get a palindrome (331323323133).

The spelling of 221121202011 in words is "two hundred twenty-one billion, one hundred twenty-one million, two hundred two thousand, eleven".