121211221012 has 48 divisors (see below), whose sum is σ = 260389360000. Its totient is φ = 49213567872.

The previous prime is 121211220983. The next prime is 121211221037. The reversal of 121211221012 is 210122112121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2298837 + ... + 2350972.

Almost surely, 2^121211221012 is an apocalyptic number.

It is an amenable number.

121211221012 is an abundant number, since it is smaller than the sum of its proper divisors (139178138988).

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

121211221012 is a wasteful number, since it uses less digits than its factorization.

121211221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649853 (or 4649837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121211221012 its reverse (210122112121), we get a palindrome (331333333133).

The spelling of 121211221012 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, twelve".