1221412011 has 8 divisors (see below), whose sum is σ = 1628710800. Its totient is φ = 814193952.

The previous prime is 1221412009. The next prime is 1221412019. The reversal of 1221412011 is 1102141221.

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

It is not a de Polignac number, because 1221412011 - 2¹ = 1221412009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221412019) 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, 49165 + ... + 69713.

It is an arithmetic number, because the mean of its divisors is an integer number (203588850).

Almost surely, 2^1221412011 is an apocalyptic number.

1221412011 is a deficient number, since it is larger than the sum of its proper divisors (407298789).

1221412011 is a wasteful number, since it uses less digits than its factorization.

1221412011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40365.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1221412011 is about 34948.7054266678. The cubic root of 1221412011 is about 1068.9418050199.

Adding to 1221412011 its reverse (1102141221), we get a palindrome (2323553232).

The spelling of 1221412011 in words is "one billion, two hundred twenty-one million, four hundred twelve thousand, eleven".