21002112101201 has 16 divisors (see below), whose sum is σ = 26194457224320. Its totient is φ = 16359028548480.

The previous prime is 21002112101119. The next prime is 21002112101281. The reversal of 21002112101201 is 10210121120012.

It is a cyclic number.

It is not a de Polignac number, because 21002112101201 - 2²⁶ = 21002044992337 is a prime.

It is a super-2 number, since 2×21002112101201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002112101281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51910586 + ... + 52313603.

It is an arithmetic number, because the mean of its divisors is an integer number (1637153576520).

Almost surely, 2^{21002112101201} is an apocalyptic number.

It is an amenable number.

21002112101201 is a deficient number, since it is larger than the sum of its proper divisors (5192345123119).

21002112101201 is a wasteful number, since it uses less digits than its factorization.

21002112101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104226824.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21002112101201 its reverse (10210121120012), we get a palindrome (31212233221213).

The spelling of 21002112101201 in words is "twenty-one trillion, two billion, one hundred twelve million, one hundred one thousand, two hundred one".