20001011020221 has 192 divisors, whose sum is σ = 36000901509120. Its totient is φ = 9591146496000.

The previous prime is 20001011020183. The next prime is 20001011020229. The reversal of 20001011020221 is 12202011010002.

It is not a de Polignac number, because 20001011020221 - 2¹¹ = 20001011018173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001011020197 and 20001011020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001011020229) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1461948501 + ... + 1461962181.

It is an arithmetic number, because the mean of its divisors is an integer number (187504695360).

Almost surely, 2^{20001011020221} is an apocalyptic number.

20001011020221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20001011020221 is a deficient number, since it is larger than the sum of its proper divisors (15999890488899).

20001011020221 is a wasteful number, since it uses less digits than its factorization.

20001011020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14156 (or 14139 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001011020221 its reverse (12202011010002), we get a palindrome (32203022030223).

The spelling of 20001011020221 in words is "twenty trillion, one billion, eleven million, twenty thousand, two hundred twenty-one".