212981502949 has 2 divisors, whose sum is σ = 212981502950. Its totient is φ = 212981502948.

The previous prime is 212981502907. The next prime is 212981502961. The reversal of 212981502949 is 949205189212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122857260100 + 90124242849 = 350510^2 + 300207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212981502949 is a prime.

It is a super-2 number, since 2×212981502949² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212981502896 and 212981502905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212981502449) 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, 106490751474 + 106490751475.

It is an arithmetic number, because the mean of its divisors is an integer number (106490751475).

Almost surely, 2^212981502949 is an apocalyptic number.

It is an amenable number.

212981502949 is a deficient number, since it is larger than the sum of its proper divisors (1).

212981502949 is an equidigital number, since it uses as much as digits as its factorization.

212981502949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 212981502949 in words is "two hundred twelve billion, nine hundred eighty-one million, five hundred two thousand, nine hundred forty-nine".