21020201010122 has 8 divisors (see below), whose sum is σ = 31530365478372. Its totient is φ = 10510079184000.

The previous prime is 21020201010119. The next prime is 21020201010167. The reversal of 21020201010122 is 22101010202012.

It can be written as a sum of positive squares in 2 ways, for example, as 21020198478841 + 2531281 = 4584779^2 + 1591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21020201010097 and 21020201010106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9398279 + ... + 11417882.

Almost surely, 2^{21020201010122} is an apocalyptic number.

21020201010122 is a deficient number, since it is larger than the sum of its proper divisors (10510164468250).

21020201010122 is a wasteful number, since it uses less digits than its factorization.

21020201010122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21321064.

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

Adding to 21020201010122 its reverse (22101010202012), we get a palindrome (43121211212134).

The spelling of 21020201010122 in words is "twenty-one trillion, twenty billion, two hundred one million, ten thousand, one hundred twenty-two".