20121020011002 has 16 divisors (see below), whose sum is σ = 40242967202592. Its totient is φ = 6706852140240.

The previous prime is 20121020010997. The next prime is 20121020011003. The reversal of 20121020011002 is 20011002012102.

It is not an unprimeable number, because it can be changed into a prime (20121020011003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38350249 + ... + 38871372.

It is an arithmetic number, because the mean of its divisors is an integer number (2515185450162).

Almost surely, 2^{20121020011002} is an apocalyptic number.

20121020011002 is an abundant number, since it is smaller than the sum of its proper divisors (20121947191590).

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

20121020011002 is a wasteful number, since it uses less digits than its factorization.

20121020011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77265053.

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

Adding to 20121020011002 its reverse (20011002012102), we get a palindrome (40132022023104).

The spelling of 20121020011002 in words is "twenty trillion, one hundred twenty-one billion, twenty million, eleven thousand, two".