21131232102030 has 64 divisors (see below), whose sum is σ = 50824204780608. Its totient is φ = 5622869560320.

The previous prime is 21131232101971. The next prime is 21131232102047. The reversal of 21131232102030 is 3020123213112.

It is a junction number, because it is equal to n+sod(n) for n = 21131232101988 and 21131232102006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25723002 + ... + 26531778.

It is an arithmetic number, because the mean of its divisors is an integer number (794128199697).

Almost surely, 2^{21131232102030} is an apocalyptic number.

21131232102030 is an abundant number, since it is smaller than the sum of its proper divisors (29692972678578).

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

21131232102030 is a wasteful number, since it uses less digits than its factorization.

21131232102030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810661.

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

Adding to 21131232102030 its reverse (3020123213112), we get a palindrome (24151355315142).

The spelling of 21131232102030 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred thirty-two million, one hundred two thousand, thirty".