2121210201031 has 4 divisors (see below), whose sum is σ = 2128758992064. Its totient is φ = 2113661410000.

The previous prime is 2121210201029. The next prime is 2121210201163. The reversal of 2121210201031 is 1301020121212.

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 2121210201031 - 2¹ = 2121210201029 is a prime.

It is a super-3 number, since 3×2121210201031³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121210200996 and 2121210201014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121210201731) 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, 3774395095 + ... + 3774395656.

It is an arithmetic number, because the mean of its divisors is an integer number (532189748016).

Almost surely, 2^{2121210201031} is an apocalyptic number.

2121210201031 is a deficient number, since it is larger than the sum of its proper divisors (7548791033).

2121210201031 is an equidigital number, since it uses as much as digits as its factorization.

2121210201031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548791032.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2121210201031 its reverse (1301020121212), we get a palindrome (3422230322243).

The spelling of 2121210201031 in words is "two trillion, one hundred twenty-one billion, two hundred ten million, two hundred one thousand, thirty-one".