100201011221 has 2 divisors, whose sum is σ = 100201011222. Its totient is φ = 100201011220.

The previous prime is 100201011203. The next prime is 100201011233. The reversal of 100201011221 is 122110102001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87743326225 + 12457684996 = 296215^2 + 111614^2 .

It is an emirp because it is prime and its reverse (122110102001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100201011221 - 2¹⁴ = 100200994837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100201041221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50100505610 + 50100505611.

It is an arithmetic number, because the mean of its divisors is an integer number (50100505611).

Almost surely, 2^100201011221 is an apocalyptic number.

It is an amenable number.

100201011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100201011221 is an equidigital number, since it uses as much as digits as its factorization.

100201011221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100201011221 its reverse (122110102001), we get a palindrome (222311113222).

The spelling of 100201011221 in words is "one hundred billion, two hundred one million, eleven thousand, two hundred twenty-one".