202144030421 has 2 divisors, whose sum is σ = 202144030422. Its totient is φ = 202144030420.

The previous prime is 202144030397. The next prime is 202144030463. The reversal of 202144030421 is 124030441202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152169427921 + 49974602500 = 390089^2 + 223550^2 .

It is a cyclic number.

It is not a de Polignac number, because 202144030421 - 2⁶ = 202144030357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202144030471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101072015210 + 101072015211.

It is an arithmetic number, because the mean of its divisors is an integer number (101072015211).

Almost surely, 2^202144030421 is an apocalyptic number.

It is an amenable number.

202144030421 is a deficient number, since it is larger than the sum of its proper divisors (1).

202144030421 is an equidigital number, since it uses as much as digits as its factorization.

202144030421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 202144030421 its reverse (124030441202), we get a palindrome (326174471623).

The spelling of 202144030421 in words is "two hundred two billion, one hundred forty-four million, thirty thousand, four hundred twenty-one".