21121002030 has 32 divisors (see below), whose sum is σ = 50697712800. Its totient is φ = 5631455232.

The previous prime is 21121002029. The next prime is 21121002043. The reversal of 21121002030 is 3020012112.

It is a junction number, because it is equal to n+sod(n) for n = 21121001997 and 21121002015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177666 + ... + 271674.

It is an arithmetic number, because the mean of its divisors is an integer number (1584303525).

Almost surely, 2^21121002030 is an apocalyptic number.

21121002030 is an abundant number, since it is smaller than the sum of its proper divisors (29576710770).

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

21121002030 is a wasteful number, since it uses less digits than its factorization.

21121002030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101508.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21121002030 its reverse (3020012112), we get a palindrome (24141014142).

The spelling of 21121002030 in words is "twenty-one billion, one hundred twenty-one million, two thousand, thirty".