12201421134 has 32 divisors (see below), whose sum is σ = 28055978496. Its totient is φ = 3465243360.

The previous prime is 12201421123. The next prime is 12201421153. The reversal of 12201421134 is 43112410221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12201421134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862777 + ... + 876804.

It is an arithmetic number, because the mean of its divisors is an integer number (876749328).

Almost surely, 2^12201421134 is an apocalyptic number.

12201421134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12201421134 is an abundant number, since it is smaller than the sum of its proper divisors (15854557362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12201421134 is a wasteful number, since it uses less digits than its factorization.

12201421134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739760.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12201421134 its reverse (43112410221), we get a palindrome (55313831355).

The spelling of 12201421134 in words is "twelve billion, two hundred one million, four hundred twenty-one thousand, one hundred thirty-four".