121311212102 has 32 divisors (see below), whose sum is σ = 186247071360. Its totient is φ = 59246352000.

The previous prime is 121311212083. The next prime is 121311212131. The reversal of 121311212102 is 201212113121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7626974 + ... + 7642862.

It is an arithmetic number, because the mean of its divisors is an integer number (5820220980).

Almost surely, 2^121311212102 is an apocalyptic number.

121311212102 is a deficient number, since it is larger than the sum of its proper divisors (64935859258).

121311212102 is a wasteful number, since it uses less digits than its factorization.

121311212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16436.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121311212102 its reverse (201212113121), we get a palindrome (322523325223).

The spelling of 121311212102 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred twelve thousand, one hundred two".