211224120764 has 24 divisors (see below), whose sum is σ = 371513252880. Its totient is φ = 105078715776.

The previous prime is 211224120761. The next prime is 211224120781. The reversal of 211224120764 is 467021422112.

It is a self number, because there is not a number n which added to its sum of digits gives 211224120764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211224120761) 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, 529592 + ... + 838400.

It is an arithmetic number, because the mean of its divisors is an integer number (15479718870).

Almost surely, 2^211224120764 is an apocalyptic number.

It is an amenable number.

211224120764 is a deficient number, since it is larger than the sum of its proper divisors (160289132116).

211224120764 is a wasteful number, since it uses less digits than its factorization.

211224120764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309677 (or 309675 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 211224120764 its reverse (467021422112), we get a palindrome (678245542876).

The spelling of 211224120764 in words is "two hundred eleven billion, two hundred twenty-four million, one hundred twenty thousand, seven hundred sixty-four".