100121020002221 has 2 divisors, whose sum is σ = 100121020002222. Its totient is φ = 100121020002220.

The previous prime is 100121020002217. The next prime is 100121020002259. The reversal of 100121020002221 is 122200020121001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73829097172996 + 26291922829225 = 8592386^2 + 5127565^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121020002221 - 2² = 100121020002217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121020002196 and 100121020002205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121020007221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060510001110 + 50060510001111.

It is an arithmetic number, because the mean of its divisors is an integer number (50060510001111).

Almost surely, 2^{100121020002221} is an apocalyptic number.

It is an amenable number.

100121020002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121020002221 is an equidigital number, since it uses as much as digits as its factorization.

100121020002221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 100121020002221 its reverse (122200020121001), we get a palindrome (222321040123222).

The spelling of 100121020002221 in words is "one hundred trillion, one hundred twenty-one billion, twenty million, two thousand, two hundred twenty-one".