1236204121 has 8 divisors (see below), whose sum is σ = 1241063424. Its totient is φ = 1231354080.

The previous prime is 1236204103. The next prime is 1236204131. The reversal of 1236204121 is 1214026321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1236204121 - 2¹³ = 1236195929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1236204092 and 1236204101.

It is not an unprimeable number, because it can be changed into a prime (1236204131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377925 + ... + 381181.

It is an arithmetic number, because the mean of its divisors is an integer number (155132928).

Almost surely, 2^1236204121 is an apocalyptic number.

It is an amenable number.

1236204121 is a deficient number, since it is larger than the sum of its proper divisors (4859303).

1236204121 is an equidigital number, since it uses as much as digits as its factorization.

1236204121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1236204121 is about 35159.6945521431. The cubic root of 1236204121 is about 1073.2396995228.

The spelling of 1236204121 in words is "one billion, two hundred thirty-six million, two hundred four thousand, one hundred twenty-one".