100212119981 has 2 divisors, whose sum is σ = 100212119982. Its totient is φ = 100212119980.

The previous prime is 100212119963. The next prime is 100212119989. The reversal of 100212119981 is 189911212001.

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., 99771329956 + 440790025 = 315866^2 + 20995^2 .

It is a cyclic number.

It is not a de Polignac number, because 100212119981 - 2¹⁴ = 100212103597 is a prime.

It is a super-2 number, since 2×100212119981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100212119989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50106059990 + 50106059991.

It is an arithmetic number, because the mean of its divisors is an integer number (50106059991).

Almost surely, 2^100212119981 is an apocalyptic number.

It is an amenable number.

100212119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

100212119981 is an equidigital number, since it uses as much as digits as its factorization.

100212119981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 100212119981 in words is "one hundred billion, two hundred twelve million, one hundred nineteen thousand, nine hundred eighty-one".