103212136123 has 2 divisors, whose sum is σ = 103212136124. Its totient is φ = 103212136122.

The previous prime is 103212136007. The next prime is 103212136127. The reversal of 103212136123 is 321631212301.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 103212136123 - 2¹⁷ = 103212005051 is a prime.

It is a super-2 number, since 2×103212136123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (103212136127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51606068061 + 51606068062.

It is an arithmetic number, because the mean of its divisors is an integer number (51606068062).

Almost surely, 2^103212136123 is an apocalyptic number.

103212136123 is a deficient number, since it is larger than the sum of its proper divisors (1).

103212136123 is an equidigital number, since it uses as much as digits as its factorization.

103212136123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 103212136123 its reverse (321631212301), we get a palindrome (424843348424).

The spelling of 103212136123 in words is "one hundred three billion, two hundred twelve million, one hundred thirty-six thousand, one hundred twenty-three".