10202121121211 has 4 divisors (see below), whose sum is σ = 10295718562800. Its totient is φ = 10108523679624.

The previous prime is 10202121121207. The next prime is 10202121121243. The reversal of 10202121121211 is 11212112120201.

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

It is a cyclic number.

It is not a de Polignac number, because 10202121121211 - 2² = 10202121121207 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 10202121121211.

It is not an unprimeable number, because it can be changed into a prime (10202121121271) 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, 46798720631 + ... + 46798720848.

It is an arithmetic number, because the mean of its divisors is an integer number (2573929640700).

Almost surely, 2^{10202121121211} is an apocalyptic number.

10202121121211 is a deficient number, since it is larger than the sum of its proper divisors (93597441589).

10202121121211 is an equidigital number, since it uses as much as digits as its factorization.

10202121121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93597441588.

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

Adding to 10202121121211 its reverse (11212112120201), we get a palindrome (21414233241412).

The spelling of 10202121121211 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".