1240021211 has 16 divisors (see below), whose sum is σ = 1466481408. Its totient is φ = 1033668000.

The previous prime is 1240021183. The next prime is 1240021213. The reversal of 1240021211 is 1121200421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1240021211 - 2¹⁴ = 1240004827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7121 + ... + 50306.

It is an arithmetic number, because the mean of its divisors is an integer number (91655088).

Almost surely, 2^1240021211 is an apocalyptic number.

1240021211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1240021211 is a deficient number, since it is larger than the sum of its proper divisors (226460197).

1240021211 is a wasteful number, since it uses less digits than its factorization.

1240021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57602.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1240021211 is about 35213.9348979917. The cubic root of 1240021211 is about 1074.3431966969.

Adding to 1240021211 its reverse (1121200421), we get a palindrome (2361221632).

The spelling of 1240021211 in words is "one billion, two hundred forty million, twenty-one thousand, two hundred eleven".