1200121023311 has 16 divisors (see below), whose sum is σ = 1413433082880. Its totient is φ = 997575990720.

The previous prime is 1200121023281. The next prime is 1200121023341. The reversal of 1200121023311 is 1133201210021.

It is an interprime number because it is at equal distance from previous prime (1200121023281) and next prime (1200121023341).

It is a cyclic number.

It is not a de Polignac number, because 1200121023311 - 2³⁸ = 925243116367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200121023311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200121023341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12471851 + ... + 12567708.

It is an arithmetic number, because the mean of its divisors is an integer number (88339567680).

Almost surely, 2^{1200121023311} is an apocalyptic number.

1200121023311 is a deficient number, since it is larger than the sum of its proper divisors (213312059569).

1200121023311 is a wasteful number, since it uses less digits than its factorization.

1200121023311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25039774.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1200121023311 its reverse (1133201210021), we get a palindrome (2333322233332).

The spelling of 1200121023311 in words is "one trillion, two hundred billion, one hundred twenty-one million, twenty-three thousand, three hundred eleven".