22131212001 has 8 divisors (see below), whose sum is σ = 29508996864. Its totient is φ = 14753784240.

The previous prime is 22131211987. The next prime is 22131212003. The reversal of 22131212001 is 10021213122.

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

It is not a de Polignac number, because 22131212001 - 2¹⁰ = 22131210977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22131212003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137971 + ... + 251591.

It is an arithmetic number, because the mean of its divisors is an integer number (3688624608).

Almost surely, 2^22131212001 is an apocalyptic number.

It is an amenable number.

22131212001 is a deficient number, since it is larger than the sum of its proper divisors (7377784863).

22131212001 is a wasteful number, since it uses less digits than its factorization.

22131212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178551.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 22131212001 its reverse (10021213122), we get a palindrome (32152425123).

It can be divided in two parts, 2213121 and 2001, that added together give a palindrome (2215122).

The spelling of 22131212001 in words is "twenty-two billion, one hundred thirty-one million, two hundred twelve thousand, one".