1212021103 has 8 divisors (see below), whose sum is σ = 1283843088. Its totient is φ = 1140257664.

The previous prime is 1212021073. The next prime is 1212021113. The reversal of 1212021103 is 3011202121.

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 1212021103 - 2¹³ = 1212012911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212021113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32325 + ... + 58897.

It is an arithmetic number, because the mean of its divisors is an integer number (160480386).

Almost surely, 2^1212021103 is an apocalyptic number.

1212021103 is a deficient number, since it is larger than the sum of its proper divisors (71821985).

1212021103 is a wasteful number, since it uses less digits than its factorization.

1212021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29273.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1212021103 is about 34814.0934536575. The cubic root of 1212021103 is about 1066.1952102822.

Adding to 1212021103 its reverse (3011202121), we get a palindrome (4223223224).

The spelling of 1212021103 in words is "one billion, two hundred twelve million, twenty-one thousand, one hundred three".