1000001212120 has 16 divisors (see below), whose sum is σ = 2250002727360. Its totient is φ = 400000484832.

The previous prime is 1000001212103. The next prime is 1000001212157. The reversal of 1000001212120 is 212121000001.

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 = 1000001212097 and 1000001212106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12500015112 + ... + 12500015191.

It is an arithmetic number, because the mean of its divisors is an integer number (140625170460).

Almost surely, 2^{1000001212120} is an apocalyptic number.

1000001212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000001212120 is an abundant number, since it is smaller than the sum of its proper divisors (1250001515240).

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

1000001212120 is a wasteful number, since it uses less digits than its factorization.

1000001212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25000030314 (or 25000030310 counting only the distinct ones).

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

Adding to 1000001212120 its reverse (212121000001), we get a palindrome (1212122212121).

It can be divided in two parts, 1000001 and 212120, that added together give a palindrome (1212121).

The spelling of 1000001212120 in words is "one trillion, one million, two hundred twelve thousand, one hundred twenty".