121212110100012 has 48 divisors (see below), whose sum is σ = 295395522616320. Its totient is φ = 38645730009792.

The previous prime is 121212110099981. The next prime is 121212110100077. The reversal of 121212110100012 is 210001011212121.

It is a happy number.

It is a super-2 number, since 2×121212110100012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121212110099964 and 121212110100000.

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, 2313535228 + ... + 2313587619.

It is an arithmetic number, because the mean of its divisors is an integer number (6154073387840).

Almost surely, 2^{121212110100012} is an apocalyptic number.

121212110100012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121212110100012 is an abundant number, since it is smaller than the sum of its proper divisors (174183412516308).

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

121212110100012 is a wasteful number, since it uses less digits than its factorization.

121212110100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627122950 (or 4627122948 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121212110100012 its reverse (210001011212121), we get a palindrome (331213121312133).

The spelling of 121212110100012 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred ten million, one hundred thousand, twelve".