1200121010121 has 8 divisors (see below), whose sum is σ = 1745630560224. Its totient is φ = 727346066720.

The previous prime is 1200121010113. The next prime is 1200121010147. The reversal of 1200121010121 is 1210101210021.

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 1200121010121 - 2³ = 1200121010113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200121010097 and 1200121010106.

It is not an unprimeable number, because it can be changed into a prime (1200121010111) 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, 18183651636 + ... + 18183651701.

It is an arithmetic number, because the mean of its divisors is an integer number (218203820028).

Almost surely, 2^{1200121010121} is an apocalyptic number.

1200121010121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200121010121 is a deficient number, since it is larger than the sum of its proper divisors (545509550103).

1200121010121 is a wasteful number, since it uses less digits than its factorization.

1200121010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36367303351.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1200121010121 its reverse (1210101210021), we get a palindrome (2410222220142).

The spelling of 1200121010121 in words is "one trillion, two hundred billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".