201042049021 has 16 divisors (see below), whose sum is σ = 227209896000. Its totient is φ = 176207673600.

The previous prime is 201042049009. The next prime is 201042049067. The reversal of 201042049021 is 120940240102.

It is a cyclic number.

It is not a de Polignac number, because 201042049021 - 2³³ = 192452114429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201042049321) 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, 235596 + ... + 676453.

It is an arithmetic number, because the mean of its divisors is an integer number (14200618500).

Almost surely, 2^201042049021 is an apocalyptic number.

It is an amenable number.

201042049021 is a deficient number, since it is larger than the sum of its proper divisors (26167846979).

201042049021 is a wasteful number, since it uses less digits than its factorization.

201042049021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912780.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 201042049021 its reverse (120940240102), we get a palindrome (321982289123).

The spelling of 201042049021 in words is "two hundred one billion, forty-two million, forty-nine thousand, twenty-one".