1001012112121 has 8 divisors (see below), whose sum is σ = 1144020547584. Its totient is φ = 858005352960.

The previous prime is 1001012112109. The next prime is 1001012112127. The reversal of 1001012112121 is 1212112101001.

It is a happy number.

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

It is not a de Polignac number, because 1001012112121 - 2¹⁹ = 1001011587833 is a prime.

It is a super-2 number, since 2×1001012112121² (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 (1001012112127) 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, 1369401 + ... + 1969081.

It is an arithmetic number, because the mean of its divisors is an integer number (143002568448).

Almost surely, 2^{1001012112121} is an apocalyptic number.

It is an amenable number.

1001012112121 is a deficient number, since it is larger than the sum of its proper divisors (143008435463).

1001012112121 is an equidigital number, since it uses as much as digits as its factorization.

1001012112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838151.

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

Adding to 1001012112121 its reverse (1212112101001), we get a palindrome (2213124213122).

The spelling of 1001012112121 in words is "one trillion, one billion, twelve million, one hundred twelve thousand, one hundred twenty-one".