1521132421223 has 8 divisors (see below), whose sum is σ = 1695379788720. Its totient is φ = 1356303830400.

The previous prime is 1521132421199. The next prime is 1521132421243. The reversal of 1521132421223 is 3221242311251.

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 1521132421223 - 2¹⁴ = 1521132404839 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 (1521132421243) 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, 2354693828 + ... + 2354694473.

It is an arithmetic number, because the mean of its divisors is an integer number (211922473590).

Almost surely, 2^{1521132421223} is an apocalyptic number.

1521132421223 is a deficient number, since it is larger than the sum of its proper divisors (174247367497).

1521132421223 is a wasteful number, since it uses less digits than its factorization.

1521132421223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709388337.

The product of its digits is 5760, while the sum is 29.

Adding to 1521132421223 its reverse (3221242311251), we get a palindrome (4742374732474).

The spelling of 1521132421223 in words is "one trillion, five hundred twenty-one billion, one hundred thirty-two million, four hundred twenty-one thousand, two hundred twenty-three".