121021010102 has 4 divisors (see below), whose sum is σ = 181531515156. Its totient is φ = 60510505050.

The previous prime is 121021010083. The next prime is 121021010113. The reversal of 121021010102 is 201010120121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201010120121 = 17 ⋅11824124713.

It is a super-2 number, since 2×121021010102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30255252524 + ... + 30255252527.

It is an arithmetic number, because the mean of its divisors is an integer number (45382878789).

Almost surely, 2^121021010102 is an apocalyptic number.

121021010102 is a deficient number, since it is larger than the sum of its proper divisors (60510505054).

121021010102 is an equidigital number, since it uses as much as digits as its factorization.

121021010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60510505053.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121021010102 its reverse (201010120121), we get a palindrome (322031130223).

The spelling of 121021010102 in words is "one hundred twenty-one billion, twenty-one million, ten thousand, one hundred two".