1200143521101 has 32 divisors (see below), whose sum is σ = 1925112755200. Its totient is φ = 649677957120.

The previous prime is 1200143521099. The next prime is 1200143521141. The reversal of 1200143521101 is 1011253410021.

It is not a de Polignac number, because 1200143521101 - 2¹ = 1200143521099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200143521141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19876365 + ... + 19936653.

It is an arithmetic number, because the mean of its divisors is an integer number (60159773600).

Almost surely, 2^{1200143521101} is an apocalyptic number.

It is an amenable number.

1200143521101 is a deficient number, since it is larger than the sum of its proper divisors (724969234099).

1200143521101 is a wasteful number, since it uses less digits than its factorization.

1200143521101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110209.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 1200143521101 its reverse (1011253410021), we get a palindrome (2211396931122).

The spelling of 1200143521101 in words is "one trillion, two hundred billion, one hundred forty-three million, five hundred twenty-one thousand, one hundred one".