121221021110102 has 4 divisors (see below), whose sum is σ = 181831531665156. Its totient is φ = 60610510555050.

The previous prime is 121221021110069. The next prime is 121221021110117. The reversal of 121221021110102 is 201011120122121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305255277524 + ... + 30305255277527.

It is an arithmetic number, because the mean of its divisors is an integer number (45457882916289).

Almost surely, 2^{121221021110102} is an apocalyptic number.

121221021110102 is a deficient number, since it is larger than the sum of its proper divisors (60610510555054).

121221021110102 is an equidigital number, since it uses as much as digits as its factorization.

121221021110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610510555053.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121221021110102 its reverse (201011120122121), we get a palindrome (322232141232223).

The spelling of 121221021110102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred ten thousand, one hundred two".