121212210102 has 32 divisors (see below), whose sum is σ = 257269478400. Its totient is φ = 37940723328.

The previous prime is 121212210089. The next prime is 121212210103. The reversal of 121212210102 is 201012212121.

It is a super-2 number, since 2×121212210102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212210103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1308702 + ... + 1398257.

It is an arithmetic number, because the mean of its divisors is an integer number (8039671200).

Almost surely, 2^121212210102 is an apocalyptic number.

121212210102 is an abundant number, since it is smaller than the sum of its proper divisors (136057268298).

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

121212210102 is a wasteful number, since it uses less digits than its factorization.

121212210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707420.

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

Adding to 121212210102 its reverse (201012212121), we get a palindrome (322224422223).

The spelling of 121212210102 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, one hundred two".