21221010000201 has 32 divisors (see below), whose sum is σ = 31975053989760. Its totient is φ = 12406546380800.

The previous prime is 21221010000191. The next prime is 21221010000221. The reversal of 21221010000201 is 10200001012212.

It is not a de Polignac number, because 21221010000201 - 2²¹ = 21221007903049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221010000221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87994260 + ... + 88235093.

It is an arithmetic number, because the mean of its divisors is an integer number (999220437180).

Almost surely, 2^{21221010000201} is an apocalyptic number.

It is an amenable number.

21221010000201 is a deficient number, since it is larger than the sum of its proper divisors (10754043989559).

21221010000201 is a wasteful number, since it uses less digits than its factorization.

21221010000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176229497.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21221010000201 its reverse (10200001012212), we get a palindrome (31421011012413).

The spelling of 21221010000201 in words is "twenty-one trillion, two hundred twenty-one billion, ten million, two hundred one", and thus it is an aban number.