100021011212021 has 2 divisors, whose sum is σ = 100021011212022. Its totient is φ = 100021011212020.

The previous prime is 100021011212011. The next prime is 100021011212027. The reversal of 100021011212021 is 120212110120001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88606715176996 + 11414296035025 = 9413114^2 + 3378505^2 .

It is a cyclic number.

It is not a de Polignac number, because 100021011212021 - 2¹⁸ = 100021010949877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100021011211987 and 100021011212005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021011212027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010505606010 + 50010505606011.

It is an arithmetic number, because the mean of its divisors is an integer number (50010505606011).

Almost surely, 2^{100021011212021} is an apocalyptic number.

It is an amenable number.

100021011212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021011212021 is an equidigital number, since it uses as much as digits as its factorization.

100021011212021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100021011212021 its reverse (120212110120001), we get a palindrome (220233121332022).

The spelling of 100021011212021 in words is "one hundred trillion, twenty-one billion, eleven million, two hundred twelve thousand, twenty-one".