20001220101012 has 48 divisors (see below), whose sum is σ = 47010027335040. Its totient is φ = 6618532380672.

The previous prime is 20001220101001. The next prime is 20001220101131. The reversal of 20001220101012 is 21010102210002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4948293 + ... + 8030444.

It is an arithmetic number, because the mean of its divisors is an integer number (979375569480).

Almost surely, 2^{20001220101012} is an apocalyptic number.

It is an amenable number.

20001220101012 is an abundant number, since it is smaller than the sum of its proper divisors (27008807234028).

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

20001220101012 is a wasteful number, since it uses less digits than its factorization.

20001220101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12979680 (or 12979678 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001220101012 its reverse (21010102210002), we get a palindrome (41011322311014).

The spelling of 20001220101012 in words is "twenty trillion, one billion, two hundred twenty million, one hundred one thousand, twelve".