20001101021010 has 72 divisors (see below), whose sum is σ = 54362160900684. Its totient is φ = 5101730103360.

The previous prime is 20001101020997. The next prime is 20001101021047. The reversal of 20001101021010 is 1012010110002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19487042134569 + 514058886441 = 4414413^2 + 716979^2 .

It is a super-2 number, since 2×20001101021010² (a number of 27 digits) contains 22 as substring.

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 = 20001101020983 and 20001101021001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 210003861 + ... + 210099080.

Almost surely, 2^{20001101021010} is an apocalyptic number.

20001101021010 is an abundant number, since it is smaller than the sum of its proper divisors (34361059879674).

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

20001101021010 is a wasteful number, since it uses less digits than its factorization.

20001101021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420103000 (or 420102974 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20001101021010 its reverse (1012010110002), we get a palindrome (21013111131012).

The spelling of 20001101021010 in words is "twenty trillion, one billion, one hundred one million, twenty-one thousand, ten".