21131133330 has 32 divisors (see below), whose sum is σ = 52463505600. Its totient is φ = 5440659392.

The previous prime is 21131133319. The next prime is 21131133341. The reversal of 21131133330 is 3333113112.

It is an interprime number because it is at equal distance from previous prime (21131133319) and next prime (21131133341).

It is a junction number, because it is equal to n+sod(n) for n = 21131133297 and 21131133306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12143460 + ... + 12145199.

It is an arithmetic number, because the mean of its divisors is an integer number (1639484550).

Almost surely, 2^21131133330 is an apocalyptic number.

21131133330 is an abundant number, since it is smaller than the sum of its proper divisors (31332372270).

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

21131133330 is a wasteful number, since it uses less digits than its factorization.

21131133330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24288698.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21131133330 its reverse (3333113112), we get a palindrome (24464246442).

The spelling of 21131133330 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, three hundred thirty".