401203121 has 4 divisors (see below), whose sum is σ = 437676144. Its totient is φ = 364730100.

The previous prime is 401203097. The next prime is 401203123. The reversal of 401203121 is 121302104.

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 a de Polignac number, because none of the positive numbers 2^k-401203121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401203096 and 401203105.

It is not an unprimeable number, because it can be changed into a prime (401203123) 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, 18236495 + ... + 18236516.

It is an arithmetic number, because the mean of its divisors is an integer number (109419036).

Almost surely, 2^401203121 is an apocalyptic number.

It is an amenable number.

401203121 is a deficient number, since it is larger than the sum of its proper divisors (36473023).

401203121 is a wasteful number, since it uses less digits than its factorization.

401203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36473022.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 401203121 is about 20030.0554417605. The cubic root of 401203121 is about 737.5442829294.

Adding to 401203121 its reverse (121302104), we get a palindrome (522505225).

The spelling of 401203121 in words is "four hundred one million, two hundred three thousand, one hundred twenty-one".