21121002430 has 16 divisors (see below), whose sum is σ = 41473968624. Its totient is φ = 7680364480.

The previous prime is 21121002403. The next prime is 21121002443. The reversal of 21121002430 is 3420012112.

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, 96004447 + ... + 96004666.

It is an arithmetic number, because the mean of its divisors is an integer number (2592123039).

Almost surely, 2^21121002430 is an apocalyptic number.

21121002430 is a deficient number, since it is larger than the sum of its proper divisors (20352966194).

21121002430 is a wasteful number, since it uses less digits than its factorization.

21121002430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192009131.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21121002430 its reverse (3420012112), we get a palindrome (24541014542).

The spelling of 21121002430 in words is "twenty-one billion, one hundred twenty-one million, two thousand, four hundred thirty".