2221033121231 has 4 divisors (see below), whose sum is σ = 2221186110000. Its totient is φ = 2220880132464.

The previous prime is 2221033121173. The next prime is 2221033121239. The reversal of 2221033121231 is 1321213301222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221033121231 is a prime.

It is a super-2 number, since 2×2221033121231² (a number of 25 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 = 2221033121197 and 2221033121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221033121239) 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, 76472606 + ... + 76501643.

It is an arithmetic number, because the mean of its divisors is an integer number (555296527500).

Almost surely, 2^{2221033121231} is an apocalyptic number.

2221033121231 is a deficient number, since it is larger than the sum of its proper divisors (152988769).

2221033121231 is a wasteful number, since it uses less digits than its factorization.

2221033121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152988768.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2221033121231 its reverse (1321213301222), we get a palindrome (3542246422453).

The spelling of 2221033121231 in words is "two trillion, two hundred twenty-one billion, thirty-three million, one hundred twenty-one thousand, two hundred thirty-one".