20210001002122 has 4 divisors (see below), whose sum is σ = 30315001503186. Its totient is φ = 10105000501060.

The previous prime is 20210001002021. The next prime is 20210001002141. The reversal of 20210001002122 is 22120010001202.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 20060804987041 + 149196015081 = 4478929^2 + 386259^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052500250529 + ... + 5052500250532.

Almost surely, 2^{20210001002122} is an apocalyptic number.

20210001002122 is a deficient number, since it is larger than the sum of its proper divisors (10105000501064).

20210001002122 is a wasteful number, since it uses less digits than its factorization.

20210001002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105000501063.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20210001002122 its reverse (22120010001202), we get a palindrome (42330011003324).

The spelling of 20210001002122 in words is "twenty trillion, two hundred ten billion, one million, two thousand, one hundred twenty-two".