121221020210102 has 16 divisors (see below), whose sum is σ = 182418220306224. Its totient is φ = 60415261440000.

The previous prime is 121221020210099. The next prime is 121221020210113. The reversal of 121221020210102 is 201012020122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77895224 + ... + 79436187.

It is an arithmetic number, because the mean of its divisors is an integer number (11401138769139).

Almost surely, 2^{121221020210102} is an apocalyptic number.

121221020210102 is a deficient number, since it is larger than the sum of its proper divisors (61197200096122).

121221020210102 is a wasteful number, since it uses less digits than its factorization.

121221020210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157332655.

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

Adding to 121221020210102 its reverse (201012020122121), we get a palindrome (322233040332223).

The spelling of 121221020210102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred ten thousand, one hundred two".