121230311212 has 24 divisors (see below), whose sum is σ = 216384793632. Its totient is φ = 59415955200.

The previous prime is 121230311201. The next prime is 121230311287. The reversal of 121230311212 is 212113032121.

It is a self number, because there is not a number n which added to its sum of digits gives 121230311212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184589 + ... + 1282852.

It is an arithmetic number, because the mean of its divisors is an integer number (9016033068).

Almost surely, 2^121230311212 is an apocalyptic number.

It is an amenable number.

121230311212 is a deficient number, since it is larger than the sum of its proper divisors (95154482420).

121230311212 is a wasteful number, since it uses less digits than its factorization.

121230311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467689 (or 2467687 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121230311212 its reverse (212113032121), we get a palindrome (333343343333).

The spelling of 121230311212 in words is "one hundred twenty-one billion, two hundred thirty million, three hundred eleven thousand, two hundred twelve".