421455422121 has 8 divisors (see below), whose sum is σ = 561943920960. Its totient is φ = 280968602352.

The previous prime is 421455422117. The next prime is 421455422173. The reversal of 421455422121 is 121224554124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421455422121 - 2² = 421455422117 is a prime.

It is a super-2 number, since 2×421455422121² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421455422321) 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, 387940 + ... + 996698.

It is an arithmetic number, because the mean of its divisors is an integer number (70242990120).

Almost surely, 2^421455422121 is an apocalyptic number.

It is an amenable number.

421455422121 is a deficient number, since it is larger than the sum of its proper divisors (140488498839).

421455422121 is a wasteful number, since it uses less digits than its factorization.

421455422121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839535.

The product of its digits is 25600, while the sum is 33.

Adding to 421455422121 its reverse (121224554124), we get a palindrome (542679976245).

The spelling of 421455422121 in words is "four hundred twenty-one billion, four hundred fifty-five million, four hundred twenty-two thousand, one hundred twenty-one".