402011123 has 2 divisors, whose sum is σ = 402011124. Its totient is φ = 402011122.

The previous prime is 402011119. The next prime is 402011161. The reversal of 402011123 is 321110204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402011123 - 2² = 402011119 is a prime.

It is a super-2 number, since 2×402011123² = 323225886031442258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402011098 and 402011107.

It is not a weakly prime, because it can be changed into another prime (402011023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201005561 + 201005562.

It is an arithmetic number, because the mean of its divisors is an integer number (201005562).

Almost surely, 2^402011123 is an apocalyptic number.

402011123 is a deficient number, since it is larger than the sum of its proper divisors (1).

402011123 is an equidigital number, since it uses as much as digits as its factorization.

402011123 is an evil number, because the sum of its binary digits is even.

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

The square root of 402011123 is about 20050.2150362534. The cubic root of 402011123 is about 738.0390760566.

Adding to 402011123 its reverse (321110204), we get a palindrome (723121327).

The spelling of 402011123 in words is "four hundred two million, eleven thousand, one hundred twenty-three".