402342134021123 has 4 divisors (see below), whose sum is σ = 412155356802168. Its totient is φ = 392528911240080.

The previous prime is 402342134021083. The next prime is 402342134021129. The reversal of 402342134021123 is 321120431243204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 402342134021123 - 2¹² = 402342134017027 is a prime.

It is a super-2 number, since 2×402342134021123² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402342134021123.

It is not an unprimeable number, because it can be changed into a prime (402342134021129) 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, 4906611390461 + ... + 4906611390542.

It is an arithmetic number, because the mean of its divisors is an integer number (103038839200542).

Almost surely, 2^{402342134021123} is an apocalyptic number.

402342134021123 is a deficient number, since it is larger than the sum of its proper divisors (9813222781045).

402342134021123 is an equidigital number, since it uses as much as digits as its factorization.

402342134021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9813222781044.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 402342134021123 its reverse (321120431243204), we get a palindrome (723462565264327).

The spelling of 402342134021123 in words is "four hundred two trillion, three hundred forty-two billion, one hundred thirty-four million, twenty-one thousand, one hundred twenty-three".