12211210019951 has 2 divisors, whose sum is σ = 12211210019952. Its totient is φ = 12211210019950.

The previous prime is 12211210019947. The next prime is 12211210020043. The reversal of 12211210019951 is 15991001211221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211210019951 - 2² = 12211210019947 is a prime.

It is a super-2 number, since 2×12211210019951² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211210519951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105605009975 + 6105605009976.

It is an arithmetic number, because the mean of its divisors is an integer number (6105605009976).

Almost surely, 2^{12211210019951} is an apocalyptic number.

12211210019951 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211210019951 is an equidigital number, since it uses as much as digits as its factorization.

12211210019951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 35.

The spelling of 12211210019951 in words is "twelve trillion, two hundred eleven billion, two hundred ten million, nineteen thousand, nine hundred fifty-one".