20202201010121 has 4 divisors (see below), whose sum is σ = 21756216472452. Its totient is φ = 18648185547792.

The previous prime is 20202201010097. The next prime is 20202201010127. The reversal of 20202201010121 is 12101010220202.

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 10472860992400 + 9729340017721 = 3236180^2 + 3119189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202201010121 - 2²² = 20202196815817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202201010096 and 20202201010105.

It is not an unprimeable number, because it can be changed into a prime (20202201010127) 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, 777007731146 + ... + 777007731171.

It is an arithmetic number, because the mean of its divisors is an integer number (5439054118113).

Almost surely, 2^{20202201010121} is an apocalyptic number.

It is an amenable number.

20202201010121 is a deficient number, since it is larger than the sum of its proper divisors (1554015462331).

20202201010121 is a wasteful number, since it uses less digits than its factorization.

20202201010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554015462330.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20202201010121 its reverse (12101010220202), we get a palindrome (32303211230323).

The spelling of 20202201010121 in words is "twenty trillion, two hundred two billion, two hundred one million, ten thousand, one hundred twenty-one".