21202101101121 has 16 divisors (see below), whose sum is σ = 29935332705024. Its totient is φ = 13301965931264.

The previous prime is 21202101101063. The next prime is 21202101101171. The reversal of 21202101101121 is 12110110120212.

It is a happy number.

It is not a de Polignac number, because 21202101101121 - 2¹⁴ = 21202101084737 is a prime.

It is a super-2 number, since 2×21202101101121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21202101101121.

It is not an unprimeable number, because it can be changed into a prime (21202101101171) 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, 19996761 + ... + 21030326.

It is an arithmetic number, because the mean of its divisors is an integer number (1870958294064).

Almost surely, 2^{21202101101121} is an apocalyptic number.

It is an amenable number.

21202101101121 is a deficient number, since it is larger than the sum of its proper divisors (8733231603903).

21202101101121 is a wasteful number, since it uses less digits than its factorization.

21202101101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41037240.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21202101101121 its reverse (12110110120212), we get a palindrome (33312211221333).

The spelling of 21202101101121 in words is "twenty-one trillion, two hundred two billion, one hundred one million, one hundred one thousand, one hundred twenty-one".