415123211021 has 4 divisors (see below), whose sum is σ = 439542223452. Its totient is φ = 390704198592.

The previous prime is 415123210933. The next prime is 415123211029. The reversal of 415123211021 is 120112321514.

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 195616905796 + 219506305225 = 442286^2 + 468515^2 .

It is a cyclic number.

It is not a de Polignac number, because 415123211021 - 2¹⁰ = 415123209997 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 (415123211029) 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, 12209506190 + ... + 12209506223.

It is an arithmetic number, because the mean of its divisors is an integer number (109885555863).

Almost surely, 2^415123211021 is an apocalyptic number.

It is an amenable number.

415123211021 is a deficient number, since it is larger than the sum of its proper divisors (24419012431).

415123211021 is a wasteful number, since it uses less digits than its factorization.

415123211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24419012430.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 415123211021 its reverse (120112321514), we get a palindrome (535235532535).

The spelling of 415123211021 in words is "four hundred fifteen billion, one hundred twenty-three million, two hundred eleven thousand, twenty-one".