1212210121104 has 320 divisors, whose sum is σ = 3764651904000. Its totient is φ = 372055541760.

The previous prime is 1212210121103. The next prime is 1212210121123. The reversal of 1212210121104 is 4011210122121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1212210121103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 91418827 + ... + 91432085.

It is an arithmetic number, because the mean of its divisors is an integer number (11764537200).

Almost surely, 2^{1212210121104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212210121104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1882325952000).

1212210121104 is an abundant number, since it is smaller than the sum of its proper divisors (2552441782896).

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

1212210121104 is a wasteful number, since it uses less digits than its factorization.

1212210121104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563 (or 13551 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212210121104 its reverse (4011210122121), we get a palindrome (5223420243225).

The spelling of 1212210121104 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, one hundred four".