123402101011 has 4 divisors (see below), whose sum is σ = 141030972592. Its totient is φ = 105773229432.

The previous prime is 123402100973. The next prime is 123402101021. The reversal of 123402101011 is 110101204321.

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 123402101011 - 2¹³ = 123402092819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123402101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8814435780 + ... + 8814435793.

It is an arithmetic number, because the mean of its divisors is an integer number (35257743148).

Almost surely, 2^123402101011 is an apocalyptic number.

123402101011 is a deficient number, since it is larger than the sum of its proper divisors (17628871581).

123402101011 is an equidigital number, since it uses as much as digits as its factorization.

123402101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17628871580.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 123402101011 its reverse (110101204321), we get a palindrome (233503305332).

The spelling of 123402101011 in words is "one hundred twenty-three billion, four hundred two million, one hundred one thousand, eleven".