20010000221010 has 72 divisors (see below), whose sum is σ = 55266374384676. Its totient is φ = 5022117696000.

The previous prime is 20010000220967. The next prime is 20010000221017. The reversal of 20010000221010 is 1012200001002.

It can be written as a sum of positive squares in 6 ways, for example, as 8041188818601 + 11968811402409 = 2835699^2 + 3459597^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20010000220983 and 20010000221001.

It is not an unprimeable number, because it can be changed into a prime (20010000221017) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 384633741 + ... + 384685760.

Almost surely, 2^{20010000221010} is an apocalyptic number.

20010000221010 is an abundant number, since it is smaller than the sum of its proper divisors (35256374163666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20010000221010 is a wasteful number, since it uses less digits than its factorization.

20010000221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769319548 (or 769319528 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010000221010 its reverse (1012200001002), we get a palindrome (21022200222012).

The spelling of 20010000221010 in words is "twenty trillion, ten billion, two hundred twenty-one thousand, ten".