1211246421 has 24 divisors (see below), whose sum is σ = 2028758592. Its totient is φ = 629217600.

The previous prime is 1211246381. The next prime is 1211246453. The reversal of 1211246421 is 1246421121.

It is not a de Polignac number, because 1211246421 - 2⁶ = 1211246357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211246391 and 1211246400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211246021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235800 + ... + 240881.

It is an arithmetic number, because the mean of its divisors is an integer number (84531608).

Almost surely, 2^1211246421 is an apocalyptic number.

1211246421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211246421 is a deficient number, since it is larger than the sum of its proper divisors (817512171).

1211246421 is a wasteful number, since it uses less digits than its factorization.

1211246421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476713 (or 476702 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 1211246421 is about 34802.9656925958. The cubic root of 1211246421 is about 1065.9680034913.

Adding to 1211246421 its reverse (1246421121), we get a palindrome (2457667542).

The spelling of 1211246421 in words is "one billion, two hundred eleven million, two hundred forty-six thousand, four hundred twenty-one".