21000130122101 has 64 divisors (see below), whose sum is σ = 23501760522240. Its totient is φ = 18640721756160.

The previous prime is 21000130122053. The next prime is 21000130122121. The reversal of 21000130122101 is 10122103100012.

It is a cyclic number.

It is not a de Polignac number, because 21000130122101 - 2¹⁸ = 21000129859957 is a prime.

It is a super-2 number, since 2×21000130122101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000130122121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20329263881 + ... + 20329264913.

It is an arithmetic number, because the mean of its divisors is an integer number (367215008160).

Almost surely, 2^{21000130122101} is an apocalyptic number.

It is an amenable number.

21000130122101 is a deficient number, since it is larger than the sum of its proper divisors (2501630400139).

21000130122101 is a wasteful number, since it uses less digits than its factorization.

21000130122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21000130122101 its reverse (10122103100012), we get a palindrome (31122233222113).

The spelling of 21000130122101 in words is "twenty-one trillion, one hundred thirty million, one hundred twenty-two thousand, one hundred one".