121221002210102 has 4 divisors (see below), whose sum is σ = 181831503315156. Its totient is φ = 60610501105050.

The previous prime is 121221002210089. The next prime is 121221002210107. The reversal of 121221002210102 is 201012200122121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221002210107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305250552524 + ... + 30305250552527.

It is an arithmetic number, because the mean of its divisors is an integer number (45457875828789).

Almost surely, 2^{121221002210102} is an apocalyptic number.

121221002210102 is a deficient number, since it is larger than the sum of its proper divisors (60610501105054).

121221002210102 is an equidigital number, since it uses as much as digits as its factorization.

121221002210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610501105053.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221002210102 its reverse (201012200122121), we get a palindrome (322233202332223).

The spelling of 121221002210102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two million, two hundred ten thousand, one hundred two".