121210100212 has 24 divisors (see below), whose sum is σ = 221445239400. Its totient is φ = 57978377856.

The previous prime is 121210100197. The next prime is 121210100213. The reversal of 121210100212 is 212001012121.

121210100212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 36158543716 + 85051556496 = 190154^2 + 291636^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121210100192 and 121210100201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210100213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4780543 + ... + 4805830.

It is an arithmetic number, because the mean of its divisors is an integer number (9226884975).

Almost surely, 2^121210100212 is an apocalyptic number.

It is an amenable number.

121210100212 is a deficient number, since it is larger than the sum of its proper divisors (100235139188).

121210100212 is a wasteful number, since it uses less digits than its factorization.

121210100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9586515 (or 9586513 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121210100212 its reverse (212001012121), we get a palindrome (333211112333).

The spelling of 121210100212 in words is "one hundred twenty-one billion, two hundred ten million, one hundred thousand, two hundred twelve".