100120012210021 has 2 divisors, whose sum is σ = 100120012210022. Its totient is φ = 100120012210020.

The previous prime is 100120012210007. The next prime is 100120012210051. The reversal of 100120012210021 is 120012210021001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96113729745121 + 4006282464900 = 9803761^2 + 2001570^2 .

It is an emirp because it is prime and its reverse (120012210021001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100120012210021 - 2¹⁷ = 100120012078949 is a prime.

It is a super-2 number, since 2×100120012210021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100120012209983 and 100120012210010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100120012210051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060006105010 + 50060006105011.

It is an arithmetic number, because the mean of its divisors is an integer number (50060006105011).

Almost surely, 2^{100120012210021} is an apocalyptic number.

It is an amenable number.

100120012210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100120012210021 is an equidigital number, since it uses as much as digits as its factorization.

100120012210021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100120012210021 its reverse (120012210021001), we get a palindrome (220132222231022).

The spelling of 100120012210021 in words is "one hundred trillion, one hundred twenty billion, twelve million, two hundred ten thousand, twenty-one".