2121223012031 has 4 divisors (see below), whose sum is σ = 2127914567592. Its totient is φ = 2114531456472.

The previous prime is 2121223012009. The next prime is 2121223012033. The reversal of 2121223012031 is 1302103221212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121223012031 - 2¹⁰ = 2121223011007 is a prime.

It is a super-2 number, since 2×2121223012031² (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 = 2121223011994 and 2121223012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121223012033) 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, 3345777305 + ... + 3345777938.

It is an arithmetic number, because the mean of its divisors is an integer number (531978641898).

Almost surely, 2^{2121223012031} is an apocalyptic number.

2121223012031 is a deficient number, since it is larger than the sum of its proper divisors (6691555561).

2121223012031 is an equidigital number, since it uses as much as digits as its factorization.

2121223012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6691555560.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2121223012031 its reverse (1302103221212), we get a palindrome (3423326233243).

The spelling of 2121223012031 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-three million, twelve thousand, thirty-one".