100101021221221 has 2 divisors, whose sum is σ = 100101021221222. Its totient is φ = 100101021221220.

The previous prime is 100101021221197. The next prime is 100101021221249. The reversal of 100101021221221 is 122122120101001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99996200036100 + 104821185121 = 9999810^2 + 323761^2 .

It is a cyclic number.

It is not a de Polignac number, because 100101021221221 - 2⁷ = 100101021221093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100101021221195 and 100101021221204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100101021221321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50050510610610 + 50050510610611.

It is an arithmetic number, because the mean of its divisors is an integer number (50050510610611).

Almost surely, 2^{100101021221221} is an apocalyptic number.

It is an amenable number.

100101021221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100101021221221 is an equidigital number, since it uses as much as digits as its factorization.

100101021221221 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 16.

Adding to 100101021221221 its reverse (122122120101001), we get a palindrome (222223141322222).

The spelling of 100101021221221 in words is "one hundred trillion, one hundred one billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".