202103100421 has 2 divisors, whose sum is σ = 202103100422. Its totient is φ = 202103100420.

The previous prime is 202103100401. The next prime is 202103100517. The reversal of 202103100421 is 124001301202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155148544321 + 46954556100 = 393889^2 + 216690^2 .

It is a cyclic number.

It is not a de Polignac number, because 202103100421 - 2⁷ = 202103100293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202103100395 and 202103100404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202103100401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051550210 + 101051550211.

It is an arithmetic number, because the mean of its divisors is an integer number (101051550211).

Almost surely, 2^202103100421 is an apocalyptic number.

It is an amenable number.

202103100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

202103100421 is an equidigital number, since it uses as much as digits as its factorization.

202103100421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202103100421 its reverse (124001301202), we get a palindrome (326104401623).

The spelling of 202103100421 in words is "two hundred two billion, one hundred three million, one hundred thousand, four hundred twenty-one".