202120110021121 has 8 divisors (see below), whose sum is σ = 202517854554600. Its totient is φ = 201722368045440.

The previous prime is 202120110021119. The next prime is 202120110021217. The reversal of 202120110021121 is 121120011021202.

It can be written as a sum of positive squares in 4 ways, for example, as 80733459632400 + 121386650388721 = 8985180^2 + 11017561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202120110021121 - 2¹ = 202120110021119 is a prime.

It is a super-3 number, since 3×202120110021121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202120110021095 and 202120110021104.

It is not an unprimeable number, because it can be changed into a prime (202120110025121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270445885 + ... + 271192213.

It is an arithmetic number, because the mean of its divisors is an integer number (25314731819325).

Almost surely, 2^{202120110021121} is an apocalyptic number.

It is an amenable number.

202120110021121 is a deficient number, since it is larger than the sum of its proper divisors (397744533479).

202120110021121 is an equidigital number, since it uses as much as digits as its factorization.

202120110021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278899.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 202120110021121 its reverse (121120011021202), we get a palindrome (323240121042323).

The spelling of 202120110021121 in words is "two hundred two trillion, one hundred twenty billion, one hundred ten million, twenty-one thousand, one hundred twenty-one".