12950213921 has 2 divisors, whose sum is σ = 12950213922. Its totient is φ = 12950213920.

The previous prime is 12950213873. The next prime is 12950213989. The reversal of 12950213921 is 12931205921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12845048896 + 105165025 = 113336^2 + 10255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12950213921 is a prime.

It is not a weakly prime, because it can be changed into another prime (12950213321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6475106960 + 6475106961.

It is an arithmetic number, because the mean of its divisors is an integer number (6475106961).

Almost surely, 2^12950213921 is an apocalyptic number.

It is an amenable number.

12950213921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12950213921 is an equidigital number, since it uses as much as digits as its factorization.

12950213921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 12950213921 in words is "twelve billion, nine hundred fifty million, two hundred thirteen thousand, nine hundred twenty-one".