201202021112121 has 6 divisors (see below), whose sum is σ = 290625141606410. Its totient is φ = 134134680741408.

The previous prime is 201202021112119. The next prime is 201202021112123. The reversal of 201202021112121 is 121211120202102.

201202021112121 is a `hidden beast` number, since 20 + 120 + 202 + 111 + 212 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (201202021112119) and next prime (201202021112123).

It can be written as a sum of positive squares in only one way, i.e., 201127393799721 + 74627312400 = 14181939^2 + 273180^2 .

It is not a de Polignac number, because 201202021112121 - 2¹ = 201202021112119 is a prime.

It is a super-3 number, since 3×201202021112121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201202021112094 and 201202021112103.

It is not an unprimeable number, because it can be changed into a prime (201202021112123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11177890061776 + ... + 11177890061793.

Almost surely, 2^{201202021112121} is an apocalyptic number.

It is an amenable number.

201202021112121 is a deficient number, since it is larger than the sum of its proper divisors (89423120494289).

201202021112121 is a wasteful number, since it uses less digits than its factorization.

201202021112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22355780123575 (or 22355780123572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201202021112121 its reverse (121211120202102), we get a palindrome (322413141314223).

The spelling of 201202021112121 in words is "two hundred one trillion, two hundred two billion, twenty-one million, one hundred twelve thousand, one hundred twenty-one".