31223121000001 has 4 divisors (see below), whose sum is σ = 35683566857152. Its totient is φ = 26762675142852.

The previous prime is 31223120999971. The next prime is 31223121000059. The reversal of 31223121000001 is 10000012132213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31223121000001 - 2⁴¹ = 29024097744449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31223121000101) 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, 2230222928565 + ... + 2230222928578.

It is an arithmetic number, because the mean of its divisors is an integer number (8920891714288).

Almost surely, 2^{31223121000001} is an apocalyptic number.

It is an amenable number.

31223121000001 is a deficient number, since it is larger than the sum of its proper divisors (4460445857151).

31223121000001 is an equidigital number, since it uses as much as digits as its factorization.

31223121000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460445857150.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31223121000001 its reverse (10000012132213), we get a palindrome (41223133132214).

The spelling of 31223121000001 in words is "thirty-one trillion, two hundred twenty-three billion, one hundred twenty-one million, one", and thus it is an aban number.