1211240001 has 8 divisors (see below), whose sum is σ = 1615183200. Its totient is φ = 807395072.

The previous prime is 1211239957. The next prime is 1211240027. The reversal of 1211240001 is 1000421121.

It is a happy number.

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 1211240001 - 2¹¹ = 1211237953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211240501) 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, 11950 + ... + 50648.

It is an arithmetic number, because the mean of its divisors is an integer number (201897900).

Almost surely, 2^1211240001 is an apocalyptic number.

It is an amenable number.

1211240001 is a deficient number, since it is larger than the sum of its proper divisors (403943199).

1211240001 is a wasteful number, since it uses less digits than its factorization.

1211240001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49135.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1211240001 is about 34802.8734589545. The cubic root of 1211240001 is about 1065.9661201622.

Adding to 1211240001 its reverse (1000421121), we get a palindrome (2211661122).

The spelling of 1211240001 in words is "one billion, two hundred eleven million, two hundred forty thousand, one".