201042210021 has 16 divisors (see below), whose sum is σ = 271755321984. Its totient is φ = 132178984704.

The previous prime is 201042209959. The next prime is 201042210043. The reversal of 201042210021 is 120012240102.

It is not a de Polignac number, because 201042210021 - 2²¹ = 201040112869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201042210121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2477920 + ... + 2557766.

It is an arithmetic number, because the mean of its divisors is an integer number (16984707624).

Almost surely, 2^201042210021 is an apocalyptic number.

It is an amenable number.

201042210021 is a deficient number, since it is larger than the sum of its proper divisors (70713111963).

201042210021 is a wasteful number, since it uses less digits than its factorization.

201042210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91420.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201042210021 its reverse (120012240102), we get a palindrome (321054450123).

The spelling of 201042210021 in words is "two hundred one billion, forty-two million, two hundred ten thousand, twenty-one".