211221011011202 has 4 divisors (see below), whose sum is σ = 316831516516806. Its totient is φ = 105610505505600.

The previous prime is 211221011011147. The next prime is 211221011011247. The reversal of 211221011011202 is 202110110122112.

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., 210872248716481 + 348762294721 = 14521441^2 + 590561^2 .

It is a super-2 number, since 2×211221011011202² (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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52805252752799 + ... + 52805252752802.

Almost surely, 2^{211221011011202} is an apocalyptic number.

211221011011202 is a deficient number, since it is larger than the sum of its proper divisors (105610505505604).

211221011011202 is a wasteful number, since it uses less digits than its factorization.

211221011011202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105610505505603.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211221011011202 its reverse (202110110122112), we get a palindrome (413331121133314).

The spelling of 211221011011202 in words is "two hundred eleven trillion, two hundred twenty-one billion, eleven million, eleven thousand, two hundred two".