1221100014 has 16 divisors (see below), whose sum is σ = 2450006352. Its totient is φ = 405732288.

The previous prime is 1221099967. The next prime is 1221100033. The reversal of 1221100014 is 4100011221.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 323229 + ... + 326984.

It is an arithmetic number, because the mean of its divisors is an integer number (153125397).

Almost surely, 2^1221100014 is an apocalyptic number.

1221100014 is an abundant number, since it is smaller than the sum of its proper divisors (1228906338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221100014 is a wasteful number, since it uses less digits than its factorization.

1221100014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650531.

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

The square root of 1221100014 is about 34944.2414998523. The cubic root of 1221100014 is about 1068.8507805788.

Adding to 1221100014 its reverse (4100011221), we get a palindrome (5321111235).

The spelling of 1221100014 in words is "one billion, two hundred twenty-one million, one hundred thousand, fourteen".