1001212121012 has 6 divisors (see below), whose sum is σ = 1752121211778. Its totient is φ = 500606060504.

The previous prime is 1001212120949. The next prime is 1001212121017. The reversal of 1001212121012 is 2101212121001.

It can be written as a sum of positive squares in only one way, i.e., 985723322896 + 15488798116 = 992836^2 + 124454^2 .

It is a super-2 number, since 2×1001212121012² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001212121017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125151515123 + ... + 125151515130.

It is an arithmetic number, because the mean of its divisors is an integer number (292020201963).

Almost surely, 2^{1001212121012} is an apocalyptic number.

It is an amenable number.

1001212121012 is a deficient number, since it is larger than the sum of its proper divisors (750909090766).

1001212121012 is a wasteful number, since it uses less digits than its factorization.

1001212121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250303030257 (or 250303030255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1001212121012 its reverse (2101212121001), we get a palindrome (3102424242013).

The spelling of 1001212121012 in words is "one trillion, one billion, two hundred twelve million, one hundred twenty-one thousand, twelve".