2121320000031 has 4 divisors (see below), whose sum is σ = 2828426666712. Its totient is φ = 1414213333352.

The previous prime is 2121320000029. The next prime is 2121320000053. The reversal of 2121320000031 is 1300000231212.

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 2121320000031 - 2¹ = 2121320000029 is a prime.

It is a super-2 number, since 2×2121320000031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121320000081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353553333336 + ... + 353553333341.

It is an arithmetic number, because the mean of its divisors is an integer number (707106666678).

Almost surely, 2^{2121320000031} is an apocalyptic number.

2121320000031 is a deficient number, since it is larger than the sum of its proper divisors (707106666681).

2121320000031 is an equidigital number, since it uses as much as digits as its factorization.

2121320000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707106666680.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 2121320000031 its reverse (1300000231212), we get a palindrome (3421320231243).

The spelling of 2121320000031 in words is "two trillion, one hundred twenty-one billion, three hundred twenty million, thirty-one", and thus it is an aban number.