1210101999949 has 2 divisors, whose sum is σ = 1210101999950. Its totient is φ = 1210101999948.

The previous prime is 1210101999929. The next prime is 1210102000067. The reversal of 1210101999949 is 9499991010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1148948172100 + 61153827849 = 1071890^2 + 247293^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210101999949 - 2¹⁵ = 1210101967181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210101999949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210101999919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605050999974 + 605050999975.

It is an arithmetic number, because the mean of its divisors is an integer number (605050999975).

Almost surely, 2^{1210101999949} is an apocalyptic number.

It is an amenable number.

1210101999949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210101999949 is an equidigital number, since it uses as much as digits as its factorization.

1210101999949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 55.

The spelling of 1210101999949 in words is "one trillion, two hundred ten billion, one hundred one million, nine hundred ninety-nine thousand, nine hundred forty-nine".