2121321013401 has 4 divisors (see below), whose sum is σ = 2828428017872. Its totient is φ = 1414214008932.

The previous prime is 2121321013367. The next prime is 2121321013411. The reversal of 2121321013401 is 1043101231212.

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 not a de Polignac number, because 2121321013401 - 2¹⁸ = 2121320751257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2121321013411) 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, 353553502231 + ... + 353553502236.

It is an arithmetic number, because the mean of its divisors is an integer number (707107004468).

Almost surely, 2^{2121321013401} is an apocalyptic number.

It is an amenable number.

2121321013401 is a deficient number, since it is larger than the sum of its proper divisors (707107004471).

2121321013401 is an equidigital number, since it uses as much as digits as its factorization.

2121321013401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707107004470.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2121321013401 its reverse (1043101231212), we get a palindrome (3164422244613).

The spelling of 2121321013401 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-one million, thirteen thousand, four hundred one".