1212222120102 has 24 divisors (see below), whose sum is σ = 3001692869136. Its totient is φ = 346349177136.

The previous prime is 1212222120079. The next prime is 1212222120103. The reversal of 1212222120102 is 2010212222121.

It is a happy number.

It is a super-3 number, since 3×1212222120102³ (a number of 37 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222120103) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4810405113 + ... + 4810405364.

It is an arithmetic number, because the mean of its divisors is an integer number (125070536214).

Almost surely, 2^{1212222120102} is an apocalyptic number.

1212222120102 is an abundant number, since it is smaller than the sum of its proper divisors (1789470749034).

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

1212222120102 is a wasteful number, since it uses less digits than its factorization.

1212222120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9620810492 (or 9620810489 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212222120102 its reverse (2010212222121), we get a palindrome (3222434342223).

The spelling of 1212222120102 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, one hundred two".