1001212210120 has 256 divisors, whose sum is σ = 2450093184000. Its totient is φ = 367043788800.

The previous prime is 1001212210099. The next prime is 1001212210171. The reversal of 1001212210120 is 210122121001.

It is a self number, because there is not a number n which added to its sum of digits gives 1001212210120.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1688384544 + ... + 1688385136.

It is an arithmetic number, because the mean of its divisors is an integer number (9570676500).

Almost surely, 2^{1001212210120} is an apocalyptic number.

1001212210120 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 1001212210120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1225046592000).

1001212210120 is an abundant number, since it is smaller than the sum of its proper divisors (1448880973880).

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

1001212210120 is a wasteful number, since it uses less digits than its factorization.

1001212210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1001212210120 its reverse (210122121001), we get a palindrome (1211334331121).

The spelling of 1001212210120 in words is "one trillion, one billion, two hundred twelve million, two hundred ten thousand, one hundred twenty".