10200020211121 has 4 divisors (see below), whose sum is σ = 10984637150452. Its totient is φ = 9415403271792.

The previous prime is 10200020211109. The next prime is 10200020211169. The reversal of 10200020211121 is 12111202000201.

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 2704580882721 + 7495439328400 = 1644561^2 + 2737780^2 .

It is a cyclic number.

It is not a de Polignac number, because 10200020211121 - 2²³ = 10200011822513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 784616939317 = 10200020211121 / (1 + 0 + 2 + 0 + 0 + 0 + 2 + 0 + 2 + 1 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10200020211721) 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, 392308469646 + ... + 392308469671.

It is an arithmetic number, because the mean of its divisors is an integer number (2746159287613).

Almost surely, 2^{10200020211121} is an apocalyptic number.

It is an amenable number.

10200020211121 is a deficient number, since it is larger than the sum of its proper divisors (784616939331).

10200020211121 is an equidigital number, since it uses as much as digits as its factorization.

10200020211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784616939330.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10200020211121 its reverse (12111202000201), we get a palindrome (22311222211322).

The spelling of 10200020211121 in words is "ten trillion, two hundred billion, twenty million, two hundred eleven thousand, one hundred twenty-one".