22121201231 has 8 divisors (see below), whose sum is σ = 23286881280. Its totient is φ = 20955661848.

The previous prime is 22121201203. The next prime is 22121201273. The reversal of 22121201231 is 13210212122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121201231 is a prime.

It is a super-2 number, since 2×22121201231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121201731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485240 + ... + 528866.

It is an arithmetic number, because the mean of its divisors is an integer number (2910860160).

Almost surely, 2^22121201231 is an apocalyptic number.

22121201231 is a deficient number, since it is larger than the sum of its proper divisors (1165680049).

22121201231 is a wasteful number, since it uses less digits than its factorization.

22121201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70333.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22121201231 its reverse (13210212122), we get a palindrome (35331413353).

The spelling of 22121201231 in words is "twenty-two billion, one hundred twenty-one million, two hundred one thousand, two hundred thirty-one".