2112001021020 has 96 divisors (see below), whose sum is σ = 6453591734016. Its totient is φ = 511810675200.

The previous prime is 2112001021003. The next prime is 2112001021021. The reversal of 2112001021020 is 201201002112.

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

It is a junction number, because it is equal to n+sod(n) for n = 2112001020987 and 2112001021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112001021021) 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, 1195560 + ... + 2377680.

It is an arithmetic number, because the mean of its divisors is an integer number (67224913896).

Almost surely, 2^{2112001021020} is an apocalyptic number.

2112001021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112001021020 is an abundant number, since it is smaller than the sum of its proper divisors (4341590712996).

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

2112001021020 is a wasteful number, since it uses less digits than its factorization.

2112001021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184851 (or 1184849 counting only the distinct ones).

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

Adding to 2112001021020 its reverse (201201002112), we get a palindrome (2313202023132).

The spelling of 2112001021020 in words is "two trillion, one hundred twelve billion, one million, twenty-one thousand, twenty".