12200121971 has 2 divisors, whose sum is σ = 12200121972. Its totient is φ = 12200121970.

The previous prime is 12200121929. The next prime is 12200122003. The reversal of 12200121971 is 17912100221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12200121971 - 2⁶ = 12200121907 is a prime.

It is a super-2 number, since 2×12200121971² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12200121971.

It is not a weakly prime, because it can be changed into another prime (12200124971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100060985 + 6100060986.

It is an arithmetic number, because the mean of its divisors is an integer number (6100060986).

Almost surely, 2^12200121971 is an apocalyptic number.

12200121971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200121971 is an equidigital number, since it uses as much as digits as its factorization.

12200121971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 12200121971 in words is "twelve billion, two hundred million, one hundred twenty-one thousand, nine hundred seventy-one".