20121220011012 has 48 divisors (see below), whose sum is σ = 47005005946752. Its totient is φ = 6699146544640.

The previous prime is 20121220011001. The next prime is 20121220011043. The reversal of 20121220011012 is 21011002212102.

It is a junction number, because it is equal to n+sod(n) for n = 20121220010982 and 20121220011000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374718838 + ... + 374772530.

It is an arithmetic number, because the mean of its divisors is an integer number (979270957224).

Almost surely, 2^{20121220011012} is an apocalyptic number.

It is an amenable number.

20121220011012 is an abundant number, since it is smaller than the sum of its proper divisors (26883785935740).

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

20121220011012 is a wasteful number, since it uses less digits than its factorization.

20121220011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90028 (or 90026 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121220011012 its reverse (21011002212102), we get a palindrome (41132222223114).

The spelling of 20121220011012 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, eleven thousand, twelve".