20011202102021 has 8 divisors (see below), whose sum is σ = 22818203302104. Its totient is φ = 17385297753600.

The previous prime is 20011202101949. The next prime is 20011202102033. The reversal of 20011202102021 is 12020120211002.

It can be written as a sum of positive squares in 4 ways, for example, as 741200464900 + 19270001637121 = 860930^2 + 4389761^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20011202102021 - 2²² = 20011197907717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20011202101987 and 20011202102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011202102321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45274212680 + ... + 45274213121.

It is an arithmetic number, because the mean of its divisors is an integer number (2852275412763).

Almost surely, 2^{20011202102021} is an apocalyptic number.

It is an amenable number.

20011202102021 is a deficient number, since it is larger than the sum of its proper divisors (2807001200083).

20011202102021 is a wasteful number, since it uses less digits than its factorization.

20011202102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90548425831.

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

Adding to 20011202102021 its reverse (12020120211002), we get a palindrome (32031322313023).

The spelling of 20011202102021 in words is "twenty trillion, eleven billion, two hundred two million, one hundred two thousand, twenty-one".