21001300130122 has 64 divisors (see below), whose sum is σ = 35170873103520. Its totient is φ = 9343177113600.

The previous prime is 21001300130099. The next prime is 21001300130159. The reversal of 21001300130122 is 22103100310012.

It can be written as a sum of positive squares in 16 ways, for example, as 1162017164961 + 19839282965161 = 1077969^2 + 4454131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21001300130096 and 21001300130105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40760472 + ... + 41272492.

Almost surely, 2^{21001300130122} is an apocalyptic number.

21001300130122 is a deficient number, since it is larger than the sum of its proper divisors (14169572973398).

21001300130122 is a wasteful number, since it uses less digits than its factorization.

21001300130122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512539.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21001300130122 its reverse (22103100310012), we get a palindrome (43104400440134).

The spelling of 21001300130122 in words is "twenty-one trillion, one billion, three hundred million, one hundred thirty thousand, one hundred twenty-two".