2121100221311 has 4 divisors (see below), whose sum is σ = 2121718080912. Its totient is φ = 2120482361712.

The previous prime is 2121100221209. The next prime is 2121100221313. The reversal of 2121100221311 is 1131220011212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121100221311 is a prime.

It is a super-2 number, since 2×2121100221311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121100221311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100221313) 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, 308924651 + ... + 308931516.

It is an arithmetic number, because the mean of its divisors is an integer number (530429520228).

Almost surely, 2^{2121100221311} is an apocalyptic number.

2121100221311 is a deficient number, since it is larger than the sum of its proper divisors (617859601).

2121100221311 is an equidigital number, since it uses as much as digits as its factorization.

2121100221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617859600.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121100221311 its reverse (1131220011212), we get a palindrome (3252320232523).

The spelling of 2121100221311 in words is "two trillion, one hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, three hundred eleven".