20101220100010 has 64 divisors (see below), whose sum is σ = 42788346681600. Its totient is φ = 6652428959232.

The previous prime is 20101220100007. The next prime is 20101220100019. The reversal of 20101220100010 is 1000102210102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 20101220100010.

It is not an unprimeable number, because it can be changed into a prime (20101220100019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6337449 + ... + 8964691.

It is an arithmetic number, because the mean of its divisors is an integer number (668567916900).

Almost surely, 2^{20101220100010} is an apocalyptic number.

20101220100010 is an abundant number, since it is smaller than the sum of its proper divisors (22687126581590).

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

20101220100010 is a wasteful number, since it uses less digits than its factorization.

20101220100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631055.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20101220100010 its reverse (1000102210102), we get a palindrome (21101322310112).

The spelling of 20101220100010 in words is "twenty trillion, one hundred one billion, two hundred twenty million, one hundred thousand, ten".