2121345314551 has 4 divisors (see below), whose sum is σ = 2246130333072. Its totient is φ = 1996560296032.

The previous prime is 2121345314521. The next prime is 2121345314593. The reversal of 2121345314551 is 1554135431212.

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

It is not a de Polignac number, because 2121345314551 - 2¹⁹ = 2121344790263 is a prime.

It is a super-3 number, since 3×2121345314551³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 2121345314551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121345314521) 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, 62392509235 + ... + 62392509268.

It is an arithmetic number, because the mean of its divisors is an integer number (561532583268).

Almost surely, 2^{2121345314551} is an apocalyptic number.

2121345314551 is a deficient number, since it is larger than the sum of its proper divisors (124785018521).

2121345314551 is a wasteful number, since it uses less digits than its factorization.

2121345314551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124785018520.

The product of its digits is 72000, while the sum is 37.

The spelling of 2121345314551 in words is "two trillion, one hundred twenty-one billion, three hundred forty-five million, three hundred fourteen thousand, five hundred fifty-one".