100021012211971 has 2 divisors, whose sum is σ = 100021012211972. Its totient is φ = 100021012211970.

The previous prime is 100021012211959. The next prime is 100021012212019. The reversal of 100021012211971 is 179112210120001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100021012211971 - 2³⁹ = 99471256398083 is a prime.

It is not a weakly prime, because it can be changed into another prime (100021012251971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010506105985 + 50010506105986.

It is an arithmetic number, because the mean of its divisors is an integer number (50010506105986).

Almost surely, 2^{100021012211971} is an apocalyptic number.

100021012211971 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021012211971 is an equidigital number, since it uses as much as digits as its factorization.

100021012211971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 28.

Adding to 100021012211971 its reverse (179112210120001), we get a palindrome (279133222331972).

The spelling of 100021012211971 in words is "one hundred trillion, twenty-one billion, twelve million, two hundred eleven thousand, nine hundred seventy-one".