2021101342405 has 4 divisors (see below), whose sum is σ = 2425321610892. Its totient is φ = 1616881073920.

The previous prime is 2021101342367. The next prime is 2021101342423. The reversal of 2021101342405 is 5042431011202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 369817231876 + 1651284110529 = 608126^2 + 1285023^2 .

It is not a de Polignac number, because 2021101342405 - 2²⁷ = 2020967124677 is a prime.

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 2021101342405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202110134236 + ... + 202110134245.

It is an arithmetic number, because the mean of its divisors is an integer number (606330402723).

Almost surely, 2^{2021101342405} is an apocalyptic number.

It is an amenable number.

2021101342405 is a deficient number, since it is larger than the sum of its proper divisors (404220268487).

2021101342405 is an equidigital number, since it uses as much as digits as its factorization.

2021101342405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404220268486.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2021101342405 its reverse (5042431011202), we get a palindrome (7063532353607).

The spelling of 2021101342405 in words is "two trillion, twenty-one billion, one hundred one million, three hundred forty-two thousand, four hundred five".