121002222100 has 36 divisors (see below), whose sum is σ = 262589949244. Its totient is φ = 48398100480.

The previous prime is 121002222091. The next prime is 121002222109. The reversal of 121002222100 is 1222200121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121002222091) and next prime (121002222109).

It can be written as a sum of positive squares in 6 ways, for example, as 629307396 + 120372914704 = 25086^2 + 346948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002222109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3246772 + ... + 3283828.

Almost surely, 2^121002222100 is an apocalyptic number.

121002222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002222100 is an abundant number, since it is smaller than the sum of its proper divisors (141587727144).

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

121002222100 is a wasteful number, since it uses less digits than its factorization.

121002222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69724 (or 69717 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121002222100 its reverse (1222200121), we get a palindrome (122224422221).

The spelling of 121002222100 in words is "one hundred twenty-one billion, two million, two hundred twenty-two thousand, one hundred".