1200100211001 has 16 divisors (see below), whose sum is σ = 1783994257920. Its totient is φ = 797336198640.

The previous prime is 1200100210987. The next prime is 1200100211017. The reversal of 1200100211001 is 1001120010021.

It is a happy number.

It is not a de Polignac number, because 1200100211001 - 2²³ = 1200091822393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1200100213001) 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, 75842185 + ... + 75858006.

It is an arithmetic number, because the mean of its divisors is an integer number (111499641120).

Almost surely, 2^{1200100211001} is an apocalyptic number.

It is an amenable number.

1200100211001 is a deficient number, since it is larger than the sum of its proper divisors (583894046919).

1200100211001 is a wasteful number, since it uses less digits than its factorization.

1200100211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151700493 (or 151700487 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1200100211001 its reverse (1001120010021), we get a palindrome (2201220221022).

It can be divided in two parts, 120010021 and 1001, that multiplied together give a palindrome (120130031021).

The spelling of 1200100211001 in words is "one trillion, two hundred billion, one hundred million, two hundred eleven thousand, one".