1200121122001 has 24 divisors (see below), whose sum is σ = 1274249037984. Its totient is φ = 1130120449920.

The previous prime is 1200121121959. The next prime is 1200121122029. The reversal of 1200121122001 is 1002211210021.

It is not a de Polignac number, because 1200121122001 - 2²⁷ = 1199986904273 is a prime.

It is a super-3 number, since 3×1200121122001³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200121122401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40253566 + ... + 40283368.

It is an arithmetic number, because the mean of its divisors is an integer number (53093709916).

Almost surely, 2^{1200121122001} is an apocalyptic number.

It is an amenable number.

1200121122001 is a deficient number, since it is larger than the sum of its proper divisors (74127915983).

1200121122001 is a wasteful number, since it uses less digits than its factorization.

1200121122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30509 (or 30490 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200121122001 its reverse (1002211210021), we get a palindrome (2202332332022).

The spelling of 1200121122001 in words is "one trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, one".