1200121001101 has 16 divisors (see below), whose sum is σ = 1320907386816. Its totient is φ = 1090304622000.

The previous prime is 1200121001099. The next prime is 1200121001117. The reversal of 1200121001101 is 1011001210021.

It is not a de Polignac number, because 1200121001101 - 2¹ = 1200121001099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200121001141) 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, 1743291 + ... + 2332231.

It is an arithmetic number, because the mean of its divisors is an integer number (82556711676).

Almost surely, 2^{1200121001101} is an apocalyptic number.

1200121001101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200121001101 is a deficient number, since it is larger than the sum of its proper divisors (120786385715).

1200121001101 is an equidigital number, since it uses as much as digits as its factorization.

1200121001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590505 (or 590483 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1200121001101 its reverse (1011001210021), we get a palindrome (2211122211122).

The spelling of 1200121001101 in words is "one trillion, two hundred billion, one hundred twenty-one million, one thousand, one hundred one".