2121504533311 has 4 divisors (see below), whose sum is σ = 2121596107192. Its totient is φ = 2121412959432.

The previous prime is 2121504533221. The next prime is 2121504533329. The reversal of 2121504533311 is 1133354051212.

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 2121504533311 - 2²¹ = 2121502436159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121504533381) 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, 45752181 + ... + 45798526.

It is an arithmetic number, because the mean of its divisors is an integer number (530399026798).

Almost surely, 2^{2121504533311} is an apocalyptic number.

2121504533311 is a deficient number, since it is larger than the sum of its proper divisors (91573881).

2121504533311 is an equidigital number, since it uses as much as digits as its factorization.

2121504533311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91573880.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 2121504533311 its reverse (1133354051212), we get a palindrome (3254858584523).

The spelling of 2121504533311 in words is "two trillion, one hundred twenty-one billion, five hundred four million, five hundred thirty-three thousand, three hundred eleven".