1211212102 has 4 divisors (see below), whose sum is σ = 1816818156. Its totient is φ = 605606050.

The previous prime is 1211212063. The next prime is 1211212117. The reversal of 1211212102 is 2012121121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302803024 + ... + 302803027.

It is an arithmetic number, because the mean of its divisors is an integer number (454204539).

Almost surely, 2^1211212102 is an apocalyptic number.

1211212102 is a deficient number, since it is larger than the sum of its proper divisors (605606054).

1211212102 is an equidigital number, since it uses as much as digits as its factorization.

1211212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605606053.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211212102 is about 34802.4726420408. The cubic root of 1211212102 is about 1065.9579358175.

Adding to 1211212102 its reverse (2012121121), we get a palindrome (3223333223).

The spelling of 1211212102 in words is "one billion, two hundred eleven million, two hundred twelve thousand, one hundred two".