221232032123311 has 4 divisors (see below), whose sum is σ = 241344035043624. Its totient is φ = 201120029203000.

The previous prime is 221232032123309. The next prime is 221232032123387. The reversal of 221232032123311 is 113321230232122.

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 221232032123311 - 2¹ = 221232032123309 is a prime.

It is a super-2 number, since 2×221232032123311² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221232032123311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232032120311) 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, 10056001460140 + ... + 10056001460161.

It is an arithmetic number, because the mean of its divisors is an integer number (60336008760906).

Almost surely, 2^{221232032123311} is an apocalyptic number.

221232032123311 is a deficient number, since it is larger than the sum of its proper divisors (20112002920313).

221232032123311 is a wasteful number, since it uses less digits than its factorization.

221232032123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112002920312.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 221232032123311 its reverse (113321230232122), we get a palindrome (334553262355433).

The spelling of 221232032123311 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, thirty-two million, one hundred twenty-three thousand, three hundred eleven".