211253245303221 has 24 divisors (see below), whose sum is σ = 337097621976960. Its totient is φ = 126411608232000.

The previous prime is 211253245303201. The next prime is 211253245303271. The reversal of 211253245303221 is 122303542352112.

211253245303221 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 5 + 324 + 5 + 3 + 0 + 322 + 1 = 666.

It is not a de Polignac number, because 211253245303221 - 2⁹ = 211253245302709 is a prime.

It is a super-2 number, since 2×211253245303221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211253245303201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13505505880 + ... + 13505521521.

It is an arithmetic number, because the mean of its divisors is an integer number (14045734249040).

Almost surely, 2^{211253245303221} is an apocalyptic number.

It is an amenable number.

211253245303221 is a deficient number, since it is larger than the sum of its proper divisors (125844376673739).

211253245303221 is a wasteful number, since it uses less digits than its factorization.

211253245303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27011027497 (or 27011027494 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 211253245303221 its reverse (122303542352112), we get a palindrome (333556787655333).

The spelling of 211253245303221 in words is "two hundred eleven trillion, two hundred fifty-three billion, two hundred forty-five million, three hundred three thousand, two hundred twenty-one".