403211212121 has 4 divisors (see below), whose sum is σ = 403293187200. Its totient is φ = 403129237044.

The previous prime is 403211212109. The next prime is 403211212139. The reversal of 403211212121 is 121212112304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 403211212121 - 2²² = 403207017817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403211212093 and 403211212102.

It is not an unprimeable number, because it can be changed into a prime (403211212181) 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, 40980161 + ... + 40989998.

It is an arithmetic number, because the mean of its divisors is an integer number (100823296800).

Almost surely, 2^403211212121 is an apocalyptic number.

It is an amenable number.

403211212121 is a deficient number, since it is larger than the sum of its proper divisors (81975079).

403211212121 is an equidigital number, since it uses as much as digits as its factorization.

403211212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81975078.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 403211212121 its reverse (121212112304), we get a palindrome (524423324425).

The spelling of 403211212121 in words is "four hundred three billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty-one".