211221431314 has 4 divisors (see below), whose sum is σ = 316832146974. Its totient is φ = 105610715656.

The previous prime is 211221431279. The next prime is 211221431353. The reversal of 211221431314 is 413134122112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 107572848289 + 103648583025 = 327983^2 + 321945^2 .

It is a super-2 number, since 2×211221431314² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52805357827 + ... + 52805357830.

Almost surely, 2^211221431314 is an apocalyptic number.

211221431314 is a deficient number, since it is larger than the sum of its proper divisors (105610715660).

211221431314 is a wasteful number, since it uses less digits than its factorization.

211221431314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105610715659.

The product of its digits is 1152, while the sum is 25.

Adding to 211221431314 its reverse (413134122112), we get a palindrome (624355553426).

The spelling of 211221431314 in words is "two hundred eleven billion, two hundred twenty-one million, four hundred thirty-one thousand, three hundred fourteen".