1212003002100 has 576 divisors, whose sum is σ = 4042109288448. Its totient is φ = 277533696000.

The previous prime is 1212003002083. The next prime is 1212003002107. The reversal of 1212003002100 is 12003002121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212003002107) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3164498509 + ... + 3164498891.

It is an arithmetic number, because the mean of its divisors is an integer number (7017550848).

Almost surely, 2^{1212003002100} is an apocalyptic number.

1212003002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212003002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021054644224).

1212003002100 is an abundant number, since it is smaller than the sum of its proper divisors (2830106286348).

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

1212003002100 is a wasteful number, since it uses less digits than its factorization.

1212003002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1212003002100 its reverse (12003002121), we get a palindrome (1224006004221).

The spelling of 1212003002100 in words is "one trillion, two hundred twelve billion, three million, two thousand, one hundred".