21020230311132 has 24 divisors (see below), whose sum is σ = 52820065910416. Its totient is φ = 6467763172608.

The previous prime is 21020230311131. The next prime is 21020230311169. The reversal of 21020230311132 is 23111303202012.

It is a junction number, because it is equal to n+sod(n) for n = 21020230311099 and 21020230311108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020230311131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67372532893 + ... + 67372533204.

Almost surely, 2^{21020230311132} is an apocalyptic number.

It is an amenable number.

21020230311132 is an abundant number, since it is smaller than the sum of its proper divisors (31799835599284).

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

21020230311132 is a wasteful number, since it uses less digits than its factorization.

21020230311132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134745066117 (or 134745066115 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21020230311132 its reverse (23111303202012), we get a palindrome (44131533513144).

The spelling of 21020230311132 in words is "twenty-one trillion, twenty billion, two hundred thirty million, three hundred eleven thousand, one hundred thirty-two".