1212210122100 has 36 divisors (see below), whose sum is σ = 3507327954144. Its totient is φ = 323256032480.

The previous prime is 1212210122083. The next prime is 1212210122143. The reversal of 1212210122100 is 12210122121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1212210122100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2020349904 + ... + 2020350503.

It is an arithmetic number, because the mean of its divisors is an integer number (97425776504).

Almost surely, 2^{1212210122100} is an apocalyptic number.

1212210122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212210122100 is an abundant number, since it is smaller than the sum of its proper divisors (2295117832044).

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

1212210122100 is a wasteful number, since it uses less digits than its factorization.

1212210122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040700424 (or 4040700417 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212210122100 its reverse (12210122121), we get a palindrome (1224420244221).

The spelling of 1212210122100 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-two thousand, one hundred".