201012211012121 has 4 divisors (see below), whose sum is σ = 201021069710544. Its totient is φ = 201003352313700.

The previous prime is 201012211012099. The next prime is 201012211012133. The reversal of 201012211012121 is 121210112210102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201012211012121 - 2¹⁰ = 201012211011097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201012211012121.

It is not an unprimeable number, because it can be changed into a prime (201012211012021) 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, 4429315175 + ... + 4429360556.

It is an arithmetic number, because the mean of its divisors is an integer number (50255267427636).

Almost surely, 2^{201012211012121} is an apocalyptic number.

It is an amenable number.

201012211012121 is a deficient number, since it is larger than the sum of its proper divisors (8858698423).

201012211012121 is an equidigital number, since it uses as much as digits as its factorization.

201012211012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8858698422.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201012211012121 its reverse (121210112210102), we get a palindrome (322222323222223).

The spelling of 201012211012121 in words is "two hundred one trillion, twelve billion, two hundred eleven million, twelve thousand, one hundred twenty-one".