211242221045 has 8 divisors (see below), whose sum is σ = 261667783680. Its totient is φ = 163542364560.

The previous prime is 211242221041. The next prime is 211242221053. The reversal of 211242221045 is 540122242112.

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

It is not a de Polignac number, because 211242221045 - 2² = 211242221041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242221041) 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, 681426365 + ... + 681426674.

It is an arithmetic number, because the mean of its divisors is an integer number (32708472960).

Almost surely, 2^211242221045 is an apocalyptic number.

It is an amenable number.

211242221045 is a deficient number, since it is larger than the sum of its proper divisors (50425562635).

211242221045 is a wasteful number, since it uses less digits than its factorization.

211242221045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362853075.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 211242221045 its reverse (540122242112), we get a palindrome (751364463157).

The spelling of 211242221045 in words is "two hundred eleven billion, two hundred forty-two million, two hundred twenty-one thousand, forty-five".