211221010214 has 16 divisors (see below), whose sum is σ = 318456434688. Its totient is φ = 105069473352.

The previous prime is 211221010213. The next prime is 211221010241. The reversal of 211221010214 is 412010122112.

It is a super-2 number, since 2×211221010214² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221010192 and 211221010201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221010213) 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, 547769 + ... + 849995.

It is an arithmetic number, because the mean of its divisors is an integer number (19903527168).

Almost surely, 2^211221010214 is an apocalyptic number.

211221010214 is a deficient number, since it is larger than the sum of its proper divisors (107235424474).

211221010214 is a wasteful number, since it uses less digits than its factorization.

211221010214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304019.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211221010214 its reverse (412010122112), we get a palindrome (623231132326).

The spelling of 211221010214 in words is "two hundred eleven billion, two hundred twenty-one million, ten thousand, two hundred fourteen".