201042020421 has 36 divisors (see below), whose sum is σ = 319683378924. Its totient is φ = 121656627840.

The previous prime is 201042020381. The next prime is 201042020471. The reversal of 201042020421 is 124020240102.

201042020421 is a `hidden beast` number, since 20 + 1 + 0 + 420 + 204 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 90875117025 + 110166903396 = 301455^2 + 331914^2 .

It is not a de Polignac number, because 201042020421 - 2⁶ = 201042020357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201042020394 and 201042020403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201042020471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 569761 + ... + 852473.

It is an arithmetic number, because the mean of its divisors is an integer number (8880093859).

Almost surely, 2^201042020421 is an apocalyptic number.

It is an amenable number.

201042020421 is a deficient number, since it is larger than the sum of its proper divisors (118641358503).

201042020421 is a wasteful number, since it uses less digits than its factorization.

201042020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283394 (or 283380 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 201042020421 its reverse (124020240102), we get a palindrome (325062260523).

The spelling of 201042020421 in words is "two hundred one billion, forty-two million, twenty thousand, four hundred twenty-one".