1200434121 has 16 divisors (see below), whose sum is σ = 1821798720. Its totient is φ = 780769440.

The previous prime is 1200434093. The next prime is 1200434129. The reversal of 1200434121 is 1214340021.

1200434121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1200434121 - 2⁶ = 1200434057 is a prime.

It is a super-2 number, since 2×1200434121² = 2882084157722085282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1200434094 and 1200434103.

It is not an unprimeable number, because it can be changed into a prime (1200434129) 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, 541095 + ... + 543308.

It is an arithmetic number, because the mean of its divisors is an integer number (113862420).

Almost surely, 2^1200434121 is an apocalyptic number.

It is an amenable number.

1200434121 is a deficient number, since it is larger than the sum of its proper divisors (621364599).

1200434121 is a wasteful number, since it uses less digits than its factorization.

1200434121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084453 (or 1084447 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1200434121 is about 34647.2815816768. The cubic root of 1200434121 is about 1062.7866988441.

Adding to 1200434121 its reverse (1214340021), we get a palindrome (2414774142).

The spelling of 1200434121 in words is "one billion, two hundred million, four hundred thirty-four thousand, one hundred twenty-one".