1012111020120 has 256 divisors, whose sum is σ = 3233696256000. Its totient is φ = 252541403136.

The previous prime is 1012111020091. The next prime is 1012111020163. The reversal of 1012111020120 is 210201112101.

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 = 1012111020096 and 1012111020105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 640981491 + ... + 640983069.

It is an arithmetic number, because the mean of its divisors is an integer number (12631626000).

Almost surely, 2^{1012111020120} is an apocalyptic number.

1012111020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012111020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1616848128000).

1012111020120 is an abundant number, since it is smaller than the sum of its proper divisors (2221585235880).

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

1012111020120 is a wasteful number, since it uses less digits than its factorization.

1012111020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242 (or 3238 counting only the distinct ones).

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

Adding to 1012111020120 its reverse (210201112101), we get a palindrome (1222312132221).

The spelling of 1012111020120 in words is "one trillion, twelve billion, one hundred eleven million, twenty thousand, one hundred twenty".