202121010201001 has 2 divisors, whose sum is σ = 202121010201002. Its totient is φ = 202121010201000.

The previous prime is 202121010200959. The next prime is 202121010201013. The reversal of 202121010201001 is 100102010121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140056928739225 + 62064081461776 = 11834565^2 + 7878076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202121010201001 is a prime.

It is not a weakly prime, because it can be changed into another prime (202121010201101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060505100500 + 101060505100501.

It is an arithmetic number, because the mean of its divisors is an integer number (101060505100501).

Almost surely, 2^{202121010201001} is an apocalyptic number.

It is an amenable number.

202121010201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121010201001 is an equidigital number, since it uses as much as digits as its factorization.

202121010201001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202121010201001 its reverse (100102010121202), we get a palindrome (302223020322203).

The spelling of 202121010201001 in words is "two hundred two trillion, one hundred twenty-one billion, ten million, two hundred one thousand, one".