30212123197 has 2 divisors, whose sum is σ = 30212123198. Its totient is φ = 30212123196.

The previous prime is 30212123171. The next prime is 30212123281. The reversal of 30212123197 is 79132121203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22830907801 + 7381215396 = 151099^2 + 85914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30212123197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30212123167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15106061598 + 15106061599.

It is an arithmetic number, because the mean of its divisors is an integer number (15106061599).

Almost surely, 2^30212123197 is an apocalyptic number.

It is an amenable number.

30212123197 is a deficient number, since it is larger than the sum of its proper divisors (1).

30212123197 is an equidigital number, since it uses as much as digits as its factorization.

30212123197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 30212123197 in words is "thirty billion, two hundred twelve million, one hundred twenty-three thousand, one hundred ninety-seven".