100212102129721 has 2 divisors, whose sum is σ = 100212102129722. Its totient is φ = 100212102129720.

The previous prime is 100212102129701. The next prime is 100212102129739. The reversal of 100212102129721 is 127921201212001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92215304294400 + 7996797835321 = 9602880^2 + 2827861^2 .

It is an emirp because it is prime and its reverse (127921201212001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100212102129721 - 2²³ = 100212093741113 is a prime.

It is not a weakly prime, because it can be changed into another prime (100212102129701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50106051064860 + 50106051064861.

It is an arithmetic number, because the mean of its divisors is an integer number (50106051064861).

Almost surely, 2^{100212102129721} is an apocalyptic number.

It is an amenable number.

100212102129721 is a deficient number, since it is larger than the sum of its proper divisors (1).

100212102129721 is an equidigital number, since it uses as much as digits as its factorization.

100212102129721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 100212102129721 in words is "one hundred trillion, two hundred twelve billion, one hundred two million, one hundred twenty-nine thousand, seven hundred twenty-one".