1001011212120 has 64 divisors (see below), whose sum is σ = 3003328873440. Its totient is φ = 266910080000.

The previous prime is 1001011212107. The next prime is 1001011212163. The reversal of 1001011212120 is 212121101001.

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 = 1001011212096 and 1001011212105.

It is a congruent number.

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, 831220 + ... + 1641020.

Almost surely, 2^{1001011212120} is an apocalyptic number.

1001011212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001011212120 is an abundant number, since it is smaller than the sum of its proper divisors (2002317661320).

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

1001011212120 is a wasteful number, since it uses less digits than its factorization.

1001011212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820116 (or 820112 counting only the distinct ones).

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

Adding to 1001011212120 its reverse (212121101001), we get a palindrome (1213132313121).

The spelling of 1001011212120 in words is "one trillion, one billion, eleven million, two hundred twelve thousand, one hundred twenty".