1001212101121 has 8 divisors (see below), whose sum is σ = 1003947184800. Its totient is φ = 998480411232.

The previous prime is 1001212101107. The next prime is 1001212101151. The reversal of 1001212101121 is 1211012121001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001212101121 - 2⁵ = 1001212101089 is a prime.

It is a super-2 number, since 2×1001212101121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001212101151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257055 + ... + 1438228.

It is an arithmetic number, because the mean of its divisors is an integer number (125493398100).

Almost surely, 2^{1001212101121} is an apocalyptic number.

It is an amenable number.

1001212101121 is a deficient number, since it is larger than the sum of its proper divisors (2735083679).

1001212101121 is a wasteful number, since it uses less digits than its factorization.

1001212101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696895.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1001212101121 its reverse (1211012121001), we get a palindrome (2212224222122).

The spelling of 1001212101121 in words is "one trillion, one billion, two hundred twelve million, one hundred one thousand, one hundred twenty-one".