1020001012120 has 32 divisors (see below), whose sum is σ = 2295039751920. Its totient is φ = 407993742720.

The previous prime is 1020001012099. The next prime is 1020001012207. The reversal of 1020001012120 is 212101000201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1020001012097 and 1020001012106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2813554 + ... + 3155326.

Almost surely, 2^{1020001012120} is an apocalyptic number.

1020001012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020001012120 is an abundant number, since it is smaller than the sum of its proper divisors (1275038739800).

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

1020001012120 is a wasteful number, since it uses less digits than its factorization.

1020001012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416395 (or 416391 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1020001012120 its reverse (212101000201), we get a palindrome (1232102012321).

The spelling of 1020001012120 in words is "one trillion, twenty billion, one million, twelve thousand, one hundred twenty".