221211314033231 has 4 divisors (see below), whose sum is σ = 221211597928464. Its totient is φ = 221211030138000.

The previous prime is 221211314033219. The next prime is 221211314033239. The reversal of 221211314033231 is 132330413112122.

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

It is a cyclic number.

It is not a de Polignac number, because 221211314033231 - 2¹⁸ = 221211313771087 is a prime.

It is a super-2 number, since 2×221211314033231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221211314033194 and 221211314033203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211314033239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140775590 + ... + 142338291.

It is an arithmetic number, because the mean of its divisors is an integer number (55302899482116).

Almost surely, 2^{221211314033231} is an apocalyptic number.

221211314033231 is a deficient number, since it is larger than the sum of its proper divisors (283895233).

221211314033231 is an equidigital number, since it uses as much as digits as its factorization.

221211314033231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283895232.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 221211314033231 its reverse (132330413112122), we get a palindrome (353541727145353).

The spelling of 221211314033231 in words is "two hundred twenty-one trillion, two hundred eleven billion, three hundred fourteen million, thirty-three thousand, two hundred thirty-one".