211221121310 has 8 divisors (see below), whose sum is σ = 380198018376. Its totient is φ = 84488448520.

The previous prime is 211221121303. The next prime is 211221121327. The reversal of 211221121310 is 13121122112.

It is a happy number.

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

It is a super-2 number, since 2×211221121310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10561056056 + ... + 10561056075.

It is an arithmetic number, because the mean of its divisors is an integer number (47524752297).

Almost surely, 2^211221121310 is an apocalyptic number.

211221121310 is a deficient number, since it is larger than the sum of its proper divisors (168976897066).

211221121310 is a wasteful number, since it uses less digits than its factorization.

211221121310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21122112138.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211221121310 its reverse (13121122112), we get a palindrome (224342243422).

The spelling of 211221121310 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred ten".