211221012220103 has 4 divisors (see below), whose sum is σ = 211402629600648. Its totient is φ = 211039394839560.

The previous prime is 211221012220093. The next prime is 211221012220123. The reversal of 211221012220103 is 301022210122112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211221012220103 - 2¹⁶ = 211221012154567 is a prime.

It is a super-2 number, since 2×211221012220103² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221012220123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90808688528 + ... + 90808690853.

It is an arithmetic number, because the mean of its divisors is an integer number (52850657400162).

Almost surely, 2^{211221012220103} is an apocalyptic number.

211221012220103 is a deficient number, since it is larger than the sum of its proper divisors (181617380545).

211221012220103 is a wasteful number, since it uses less digits than its factorization.

211221012220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181617380544.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 211221012220103 its reverse (301022210122112), we get a palindrome (512243222342215).

The spelling of 211221012220103 in words is "two hundred eleven trillion, two hundred twenty-one billion, twelve million, two hundred twenty thousand, one hundred three".