1200011002121 has 8 divisors (see below), whose sum is σ = 1200707202624. Its totient is φ = 1199314967760.

The previous prime is 1200011002111. The next prime is 1200011002241. The reversal of 1200011002121 is 1212001100021.

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 1200011002121 - 2²⁶ = 1199943893257 is a prime.

It is a super-2 number, since 2×1200011002121² (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 (1200011002111) 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, 16208630 + ... + 16282496.

It is an arithmetic number, because the mean of its divisors is an integer number (150088400328).

Almost surely, 2^{1200011002121} is an apocalyptic number.

It is an amenable number.

1200011002121 is a deficient number, since it is larger than the sum of its proper divisors (696200503).

1200011002121 is an equidigital number, since it uses as much as digits as its factorization.

1200011002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83071.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200011002121 its reverse (1212001100021), we get a palindrome (2412012102142).

The spelling of 1200011002121 in words is "one trillion, two hundred billion, eleven million, two thousand, one hundred twenty-one".