2121354331511 has 8 divisors (see below), whose sum is σ = 2121967638000. Its totient is φ = 2120741124352.

The previous prime is 2121354331493. The next prime is 2121354331549. The reversal of 2121354331511 is 1151334531212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121354331511 - 2³⁸ = 1846476424567 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 (2121354331711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64163861 + ... + 64196913.

It is an arithmetic number, because the mean of its divisors is an integer number (265245954750).

Almost surely, 2^{2121354331511} is an apocalyptic number.

2121354331511 is a deficient number, since it is larger than the sum of its proper divisors (613306489).

2121354331511 is a wasteful number, since it uses less digits than its factorization.

2121354331511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49665.

The product of its digits is 10800, while the sum is 32.

Adding to 2121354331511 its reverse (1151334531212), we get a palindrome (3272688862723).

The spelling of 2121354331511 in words is "two trillion, one hundred twenty-one billion, three hundred fifty-four million, three hundred thirty-one thousand, five hundred eleven".