2121321213201 has 16 divisors (see below), whose sum is σ = 2833559039808. Its totient is φ = 1411649472000.

The previous prime is 2121321213197. The next prime is 2121321213211. The reversal of 2121321213201 is 1023121231212.

It is not a de Polignac number, because 2121321213201 - 2² = 2121321213197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121321213211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12440761 + ... + 12610121.

It is an arithmetic number, because the mean of its divisors is an integer number (177097439988).

Almost surely, 2^{2121321213201} is an apocalyptic number.

It is an amenable number.

2121321213201 is a deficient number, since it is larger than the sum of its proper divisors (712237826607).

2121321213201 is a wasteful number, since it uses less digits than its factorization.

2121321213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176912.

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

Adding to 2121321213201 its reverse (1023121231212), we get a palindrome (3144442444413).

The spelling of 2121321213201 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred one".