2131223220001 has 4 divisors (see below), whose sum is σ = 2131258995904. Its totient is φ = 2131187444100.

The previous prime is 2131223219929. The next prime is 2131223220011. The reversal of 2131223220001 is 1000223221312.

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 2131223220001 - 2²³ = 2131214831393 is a prime.

It is a super-2 number, since 2×2131223220001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131223220011) 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, 17798445 + ... + 17917786.

It is an arithmetic number, because the mean of its divisors is an integer number (532814748976).

Almost surely, 2^{2131223220001} is an apocalyptic number.

It is an amenable number.

2131223220001 is a deficient number, since it is larger than the sum of its proper divisors (35775903).

2131223220001 is an equidigital number, since it uses as much as digits as its factorization.

2131223220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35775902.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2131223220001 its reverse (1000223221312), we get a palindrome (3131446441313).

The spelling of 2131223220001 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-three million, two hundred twenty thousand, one".