21201331202030 has 32 divisors (see below), whose sum is σ = 44037605574144. Its totient is φ = 7198454752416.

The previous prime is 21201331201997. The next prime is 21201331202039. The reversal of 21201331202030 is 3020213310212.

It is a super-2 number, since 2×21201331202030² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21201331201993 and 21201331202011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201331202039) 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, 1470265412 + ... + 1470279831.

It is an arithmetic number, because the mean of its divisors is an integer number (1376175174192).

Almost surely, 2^{21201331202030} is an apocalyptic number.

21201331202030 is an abundant number, since it is smaller than the sum of its proper divisors (22836274372114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21201331202030 is a wasteful number, since it uses less digits than its factorization.

21201331202030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940545360.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21201331202030 its reverse (3020213310212), we get a palindrome (24221544512242).

The spelling of 21201331202030 in words is "twenty-one trillion, two hundred one billion, three hundred thirty-one million, two hundred two thousand, thirty".