211214550521 has 16 divisors (see below), whose sum is σ = 239798423424. Its totient is φ = 184567832064.

The previous prime is 211214550517. The next prime is 211214550539. The reversal of 211214550521 is 125055412112.

It is a cyclic number.

It is not a de Polignac number, because 211214550521 - 2² = 211214550517 is a prime.

It is a super-2 number, since 2×211214550521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211214550541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3612251 + ... + 3670256.

It is an arithmetic number, because the mean of its divisors is an integer number (14987401464).

Almost surely, 2^211214550521 is an apocalyptic number.

It is an amenable number.

211214550521 is a deficient number, since it is larger than the sum of its proper divisors (28583872903).

211214550521 is a wasteful number, since it uses less digits than its factorization.

211214550521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282640.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 211214550521 its reverse (125055412112), we get a palindrome (336269962633).

The spelling of 211214550521 in words is "two hundred eleven billion, two hundred fourteen million, five hundred fifty thousand, five hundred twenty-one".