1212121100102 has 16 divisors (see below), whose sum is σ = 1986706591632. Its totient is φ = 550065330720.

The previous prime is 1212121100089. The next prime is 1212121100147. The reversal of 1212121100102 is 2010011212121.

It is a super-2 number, since 2×1212121100102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44926493 + ... + 44953464.

It is an arithmetic number, because the mean of its divisors is an integer number (124169161977).

Almost surely, 2^{1212121100102} is an apocalyptic number.

1212121100102 is a deficient number, since it is larger than the sum of its proper divisors (774585491530).

1212121100102 is a wasteful number, since it uses less digits than its factorization.

1212121100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89880583.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212121100102 its reverse (2010011212121), we get a palindrome (3222132312223).

The spelling of 1212121100102 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred thousand, one hundred two".