21040121030 has 16 divisors (see below), whose sum is σ = 38247192144. Its totient is φ = 8332720800.

The previous prime is 21040121021. The next prime is 21040121057. The reversal of 21040121030 is 3012104012.

It is a junction number, because it is equal to n+sod(n) for n = 21040120996 and 21040121014.

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, 10414892 + ... + 10416911.

It is an arithmetic number, because the mean of its divisors is an integer number (2390449509).

Almost surely, 2^21040121030 is an apocalyptic number.

21040121030 is a deficient number, since it is larger than the sum of its proper divisors (17207071114).

21040121030 is a wasteful number, since it uses less digits than its factorization.

21040121030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20831911.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21040121030 its reverse (3012104012), we get a palindrome (24052225042).

The spelling of 21040121030 in words is "twenty-one billion, forty million, one hundred twenty-one thousand, thirty".