20210011020221 has 4 divisors (see below), whose sum is σ = 22047284749344. Its totient is φ = 18372737291100.

The previous prime is 20210011020217. The next prime is 20210011020229. The reversal of 20210011020221 is 12202011001202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20210011020221 - 2² = 20210011020217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210011020196 and 20210011020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210011020229) 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, 918636864545 + ... + 918636864566.

It is an arithmetic number, because the mean of its divisors is an integer number (5511821187336).

Almost surely, 2^{20210011020221} is an apocalyptic number.

It is an amenable number.

20210011020221 is a deficient number, since it is larger than the sum of its proper divisors (1837273729123).

20210011020221 is a wasteful number, since it uses less digits than its factorization.

20210011020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837273729122.

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

Adding to 20210011020221 its reverse (12202011001202), we get a palindrome (32412022021423).

The spelling of 20210011020221 in words is "twenty trillion, two hundred ten billion, eleven million, twenty thousand, two hundred twenty-one".