201001020202421 has 2 divisors, whose sum is σ = 201001020202422. Its totient is φ = 201001020202420.

The previous prime is 201001020202403. The next prime is 201001020202471. The reversal of 201001020202421 is 124202020100102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200299228649521 + 701791552900 = 14152711^2 + 837730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201001020202421 is a prime.

It is a super-2 number, since 2×201001020202421² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201001020202421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201001020202471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500510101210 + 100500510101211.

It is an arithmetic number, because the mean of its divisors is an integer number (100500510101211).

Almost surely, 2^{201001020202421} is an apocalyptic number.

It is an amenable number.

201001020202421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001020202421 is an equidigital number, since it uses as much as digits as its factorization.

201001020202421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 201001020202421 its reverse (124202020100102), we get a palindrome (325203040302523).

The spelling of 201001020202421 in words is "two hundred one trillion, one billion, twenty million, two hundred two thousand, four hundred twenty-one".