121100001212 has 48 divisors (see below), whose sum is σ = 228361728000. Its totient is φ = 56027220480.

The previous prime is 121100001203. The next prime is 121100001221. The reversal of 121100001212 is 212100001121.

It is an interprime number because it is at equal distance from previous prime (121100001203) and next prime (121100001221).

It is a junction number, because it is equal to n+sod(n) for n = 121100001193 and 121100001202.

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, 9031289 + ... + 9044687.

It is an arithmetic number, because the mean of its divisors is an integer number (4757536000).

Almost surely, 2^121100001212 is an apocalyptic number.

It is an amenable number.

121100001212 is a deficient number, since it is larger than the sum of its proper divisors (107261726788).

121100001212 is a wasteful number, since it uses less digits than its factorization.

121100001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16626 (or 16624 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121100001212 its reverse (212100001121), we get a palindrome (333200002333).

Subtracting 121100001212 from its reverse (212100001121), we obtain a palindrome (90999999909).

The spelling of 121100001212 in words is "one hundred twenty-one billion, one hundred million, one thousand, two hundred twelve".