201201021212021 has 4 divisors (see below), whose sum is σ = 206108363192844. Its totient is φ = 196293679231200.

The previous prime is 201201021211973. The next prime is 201201021212033. The reversal of 201201021212021 is 120212120102102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13150675420996 + 188050345791025 = 3626386^2 + 13713145^2 .

It is a cyclic number.

It is not a de Polignac number, because 201201021212021 - 2²² = 201201017017717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201021212071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453670990350 + ... + 2453670990431.

It is an arithmetic number, because the mean of its divisors is an integer number (51527090798211).

Almost surely, 2^{201201021212021} is an apocalyptic number.

It is an amenable number.

201201021212021 is a deficient number, since it is larger than the sum of its proper divisors (4907341980823).

201201021212021 is an equidigital number, since it uses as much as digits as its factorization.

201201021212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907341980822.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201201021212021 its reverse (120212120102102), we get a palindrome (321413141314123).

The spelling of 201201021212021 in words is "two hundred one trillion, two hundred one billion, twenty-one million, two hundred twelve thousand, twenty-one".