21300121030 has 16 divisors (see below), whose sum is σ = 38386593360. Its totient is φ = 8509742752.

The previous prime is 21300121001. The next prime is 21300121043. The reversal of 21300121030 is 3012100312.

It is a self number, because there is not a number n which added to its sum of digits gives 21300121030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279525 + ... + 1296064.

It is an arithmetic number, because the mean of its divisors is an integer number (2399162085).

Almost surely, 2^21300121030 is an apocalyptic number.

21300121030 is a deficient number, since it is larger than the sum of its proper divisors (17086472330).

21300121030 is a wasteful number, since it uses less digits than its factorization.

21300121030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576423.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21300121030 its reverse (3012100312), we get a palindrome (24312221342).

The spelling of 21300121030 in words is "twenty-one billion, three hundred million, one hundred twenty-one thousand, thirty".