402444124121 has 8 divisors (see below), whose sum is σ = 438623068800. Its totient is φ = 367011137232.

The previous prime is 402444124097. The next prime is 402444124153. The reversal of 402444124121 is 121421444204.

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 402444124121 - 2¹⁸ = 402443861977 is a prime.

It is a super-2 number, since 2×402444124121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402444124921) 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, 186488321 + ... + 186490478.

It is an arithmetic number, because the mean of its divisors is an integer number (54827883600).

Almost surely, 2^402444124121 is an apocalyptic number.

It is an amenable number.

402444124121 is a deficient number, since it is larger than the sum of its proper divisors (36178944679).

402444124121 is a wasteful number, since it uses less digits than its factorization.

402444124121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372978895.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 402444124121 its reverse (121421444204), we get a palindrome (523865568325).

The spelling of 402444124121 in words is "four hundred two billion, four hundred forty-four million, one hundred twenty-four thousand, one hundred twenty-one".