225023212421 has 8 divisors (see below), whose sum is σ = 257182459584. Its totient is φ = 192867233760.

The previous prime is 225023212399. The next prime is 225023212471. The reversal of 225023212421 is 124212320522.

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 225023212421 - 2¹⁰ = 225023211397 is a prime.

It is a super-2 number, since 2×225023212421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225023212471) 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, 667775 + ... + 946556.

It is an arithmetic number, because the mean of its divisors is an integer number (32147807448).

Almost surely, 2^225023212421 is an apocalyptic number.

It is an amenable number.

225023212421 is a deficient number, since it is larger than the sum of its proper divisors (32159247163).

225023212421 is a wasteful number, since it uses less digits than its factorization.

225023212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634251.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 225023212421 its reverse (124212320522), we get a palindrome (349235532943).

The spelling of 225023212421 in words is "two hundred twenty-five billion, twenty-three million, two hundred twelve thousand, four hundred twenty-one".