121200211312 has 20 divisors (see below), whose sum is σ = 236005442800. Its totient is φ = 60295580928.

The previous prime is 121200211283. The next prime is 121200211337. The reversal of 121200211312 is 213112002121.

It is a super-2 number, since 2×121200211312² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19029513 + ... + 19035880.

It is an arithmetic number, because the mean of its divisors is an integer number (11800272140).

Almost surely, 2^121200211312 is an apocalyptic number.

It is an amenable number.

121200211312 is a deficient number, since it is larger than the sum of its proper divisors (114805231488).

121200211312 is a wasteful number, since it uses less digits than its factorization.

121200211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38065600 (or 38065594 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121200211312 its reverse (213112002121), we get a palindrome (334312213433).

The spelling of 121200211312 in words is "one hundred twenty-one billion, two hundred million, two hundred eleven thousand, three hundred twelve".