421401100044121 has 12 divisors (see below), whose sum is σ = 440944999190400. Its totient is φ = 402645395641320.

The previous prime is 421401100044091. The next prime is 421401100044131. The reversal of 421401100044121 is 121440001104124.

It is not a de Polignac number, because 421401100044121 - 2⁴³ = 412605007021913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421401100044131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2775257661 + ... + 2775409498.

It is an arithmetic number, because the mean of its divisors is an integer number (36745416599200).

Almost surely, 2^{421401100044121} is an apocalyptic number.

It is an amenable number.

421401100044121 is a deficient number, since it is larger than the sum of its proper divisors (19543899146279).

421401100044121 is an equidigital number, since it uses as much as digits as its factorization.

421401100044121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550667300 (or 5550667269 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 421401100044121 its reverse (121440001104124), we get a palindrome (542841101148245).

The spelling of 421401100044121 in words is "four hundred twenty-one trillion, four hundred one billion, one hundred million, forty-four thousand, one hundred twenty-one".