201001000101221 has 2 divisors, whose sum is σ = 201001000101222. Its totient is φ = 201001000101220.

The previous prime is 201001000101197. The next prime is 201001000101359. The reversal of 201001000101221 is 122101000100102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161073893037121 + 39927107064100 = 12691489^2 + 6318790^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001000101221 - 2¹⁴ = 201001000084837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201001000121221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500500050610 + 100500500050611.

It is an arithmetic number, because the mean of its divisors is an integer number (100500500050611).

Almost surely, 2^{201001000101221} is an apocalyptic number.

It is an amenable number.

201001000101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001000101221 is an equidigital number, since it uses as much as digits as its factorization.

201001000101221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 201001000101221 its reverse (122101000100102), we get a palindrome (323102000201323).

The spelling of 201001000101221 in words is "two hundred one trillion, one billion, one hundred one thousand, two hundred twenty-one".