100021121201 has 2 divisors, whose sum is σ = 100021121202. Its totient is φ = 100021121200.

The previous prime is 100021121183. The next prime is 100021121227. The reversal of 100021121201 is 102121120001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83058663601 + 16962457600 = 288199^2 + 130240^2 .

It is a cyclic number.

It is not a de Polignac number, because 100021121201 - 2²⁶ = 99954012337 is a prime.

It is not a weakly prime, because it can be changed into another prime (100021121401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010560600 + 50010560601.

It is an arithmetic number, because the mean of its divisors is an integer number (50010560601).

Almost surely, 2^100021121201 is an apocalyptic number.

It is an amenable number.

100021121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021121201 is an equidigital number, since it uses as much as digits as its factorization.

100021121201 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 100021121201 its reverse (102121120001), we get a palindrome (202142241202).

The spelling of 100021121201 in words is "one hundred billion, twenty-one million, one hundred twenty-one thousand, two hundred one".