212103023129 has 2 divisors, whose sum is σ = 212103023130. Its totient is φ = 212103023128.

The previous prime is 212103023081. The next prime is 212103023141. The reversal of 212103023129 is 921320301212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152677747600 + 59425275529 = 390740^2 + 243773^2 .

It is a cyclic number.

It is not a de Polignac number, because 212103023129 - 2¹² = 212103019033 is a prime.

It is a super-2 number, since 2×212103023129² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212103023098 and 212103023107.

It is not a weakly prime, because it can be changed into another prime (212103023189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051511564 + 106051511565.

It is an arithmetic number, because the mean of its divisors is an integer number (106051511565).

Almost surely, 2^212103023129 is an apocalyptic number.

It is an amenable number.

212103023129 is a deficient number, since it is larger than the sum of its proper divisors (1).

212103023129 is an equidigital number, since it uses as much as digits as its factorization.

212103023129 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 26.

The spelling of 212103023129 in words is "two hundred twelve billion, one hundred three million, twenty-three thousand, one hundred twenty-nine".