1210001022120 has 128 divisors (see below), whose sum is σ = 3981882602880. Its totient is φ = 291712896000.

The previous prime is 1210001022101. The next prime is 1210001022127. The reversal of 1210001022120 is 212201000121.

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 = 1210001022096 and 1210001022105.

It is not an unprimeable number, because it can be changed into a prime (1210001022127) 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, 2293311 + ... + 2771150.

It is an arithmetic number, because the mean of its divisors is an integer number (31108457835).

Almost surely, 2^{1210001022120} is an apocalyptic number.

1210001022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210001022120 is an abundant number, since it is smaller than the sum of its proper divisors (2771881580760).

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

1210001022120 is a wasteful number, since it uses less digits than its factorization.

1210001022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064667 (or 5064663 counting only the distinct ones).

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

Adding to 1210001022120 its reverse (212201000121), we get a palindrome (1422202022241).

The spelling of 1210001022120 in words is "one trillion, two hundred ten billion, one million, twenty-two thousand, one hundred twenty".