20121001111002 has 32 divisors (see below), whose sum is σ = 43900879380480. Its totient is φ = 6097201769520.

The previous prime is 20121001110997. The next prime is 20121001111021. The reversal of 20121001111002 is 20011110012102.

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, 4048293 + ... + 7525335.

It is an arithmetic number, because the mean of its divisors is an integer number (1371902480640).

Almost surely, 2^{20121001111002} is an apocalyptic number.

20121001111002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121001111002 is an abundant number, since it is smaller than the sum of its proper divisors (23779878269478).

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

20121001111002 is a wasteful number, since it uses less digits than its factorization.

20121001111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564738.

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

Adding to 20121001111002 its reverse (20011110012102), we get a palindrome (40132111123104).

The spelling of 20121001111002 in words is "twenty trillion, one hundred twenty-one billion, one million, one hundred eleven thousand, two".