20101211211010 has 64 divisors (see below), whose sum is σ = 38398022369280. Its totient is φ = 7555034047680.

The previous prime is 20101211210999. The next prime is 20101211211013. The reversal of 20101211211010 is 1011211210102.

It is a happy number.

It is a super-2 number, since 2×20101211211010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20101211211013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80638665 + ... + 80887555.

It is an arithmetic number, because the mean of its divisors is an integer number (599969099520).

Almost surely, 2^{20101211211010} is an apocalyptic number.

20101211211010 is a deficient number, since it is larger than the sum of its proper divisors (18296811158270).

20101211211010 is a wasteful number, since it uses less digits than its factorization.

20101211211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252391.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20101211211010 its reverse (1011211210102), we get a palindrome (21112422421112).

The spelling of 20101211211010 in words is "twenty trillion, one hundred one billion, two hundred eleven million, two hundred eleven thousand, ten".