402210343121 has 4 divisors (see below), whose sum is σ = 402707513700. Its totient is φ = 401713172544.

The previous prime is 402210343079. The next prime is 402210343123. The reversal of 402210343121 is 121343012204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 225549006400 + 176661336721 = 474920^2 + 420311^2 .

It is a cyclic number.

It is not a de Polignac number, because 402210343121 - 2⁶ = 402210343057 is a prime.

It is a super-2 number, since 2×402210343121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402210343123) 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, 248584076 + ... + 248585693.

It is an arithmetic number, because the mean of its divisors is an integer number (100676878425).

Almost surely, 2^402210343121 is an apocalyptic number.

It is an amenable number.

402210343121 is a deficient number, since it is larger than the sum of its proper divisors (497170579).

402210343121 is an equidigital number, since it uses as much as digits as its factorization.

402210343121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497170578.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 402210343121 its reverse (121343012204), we get a palindrome (523553355325).

The spelling of 402210343121 in words is "four hundred two billion, two hundred ten million, three hundred forty-three thousand, one hundred twenty-one".