1211144204951 has 2 divisors, whose sum is σ = 1211144204952. Its totient is φ = 1211144204950.

The previous prime is 1211144204947. The next prime is 1211144204983. The reversal of 1211144204951 is 1594024411121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211144204951 - 2² = 1211144204947 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211144204911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605572102475 + 605572102476.

It is an arithmetic number, because the mean of its divisors is an integer number (605572102476).

Almost surely, 2^{1211144204951} is an apocalyptic number.

1211144204951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211144204951 is an equidigital number, since it uses as much as digits as its factorization.

1211144204951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 1211144204951 in words is "one trillion, two hundred eleven billion, one hundred forty-four million, two hundred four thousand, nine hundred fifty-one".