20001211101210 has 16 divisors (see below), whose sum is σ = 48002906642976. Its totient is φ = 5333656293648.

The previous prime is 20001211101121. The next prime is 20001211101217. The reversal of 20001211101210 is 1210111210002.

It is a super-2 number, since 2×20001211101210² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20001211101217) 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 7 ways as a sum of consecutive naturals, for example, 333353518324 + ... + 333353518383.

It is an arithmetic number, because the mean of its divisors is an integer number (3000181665186).

Almost surely, 2^{20001211101210} is an apocalyptic number.

20001211101210 is an abundant number, since it is smaller than the sum of its proper divisors (28001695541766).

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

20001211101210 is a wasteful number, since it uses less digits than its factorization.

20001211101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666707036717.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20001211101210 its reverse (1210111210002), we get a palindrome (21211322311212).

The spelling of 20001211101210 in words is "twenty trillion, one billion, two hundred eleven million, one hundred one thousand, two hundred ten".