10221210200921 has 2 divisors, whose sum is σ = 10221210200922. Its totient is φ = 10221210200920.

The previous prime is 10221210200867. The next prime is 10221210201031. The reversal of 10221210200921 is 12900201212201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7099666830400 + 3121543370521 = 2664520^2 + 1766789^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221210200921 - 2²² = 10221206006617 is a prime.

It is not a weakly prime, because it can be changed into another prime (10221210208921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110605100460 + 5110605100461.

It is an arithmetic number, because the mean of its divisors is an integer number (5110605100461).

Almost surely, 2^{10221210200921} is an apocalyptic number.

It is an amenable number.

10221210200921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221210200921 is an equidigital number, since it uses as much as digits as its factorization.

10221210200921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 10221210200921 in words is "ten trillion, two hundred twenty-one billion, two hundred ten million, two hundred thousand, nine hundred twenty-one".