201142020021 has 16 divisors (see below), whose sum is σ = 268966311936. Its totient is φ = 133706405376.

The previous prime is 201142020011. The next prime is 201142020097. The reversal of 201142020021 is 120020241102.

It is not a de Polignac number, because 201142020021 - 2⁷ = 201142019893 is a prime.

It is a super-2 number, since 2×201142020021² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201142020011) 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, 4335081 + ... + 4381233.

It is an arithmetic number, because the mean of its divisors is an integer number (16810394496).

Almost surely, 2^201142020021 is an apocalyptic number.

It is an amenable number.

201142020021 is a deficient number, since it is larger than the sum of its proper divisors (67824291915).

201142020021 is a wasteful number, since it uses less digits than its factorization.

201142020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50332.

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

Adding to 201142020021 its reverse (120020241102), we get a palindrome (321162261123).

The spelling of 201142020021 in words is "two hundred one billion, one hundred forty-two million, twenty thousand, twenty-one".