20010111021208 has 128 divisors (see below), whose sum is σ = 48507547345920. Its totient is φ = 7511794536960.

The previous prime is 20010111021163. The next prime is 20010111021209. The reversal of 20010111021208 is 80212011101002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010111021209) 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, 1914291 + ... + 6609442.

It is an arithmetic number, because the mean of its divisors is an integer number (378965213640).

Almost surely, 2^{20010111021208} is an apocalyptic number.

20010111021208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20010111021208 is an abundant number, since it is smaller than the sum of its proper divisors (28497436324712).

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

20010111021208 is a wasteful number, since it uses less digits than its factorization.

20010111021208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8523897 (or 8523893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

The spelling of 20010111021208 in words is "twenty trillion, ten billion, one hundred eleven million, twenty-one thousand, two hundred eight".