121221110020102 has 4 divisors (see below), whose sum is σ = 181831665030156. Its totient is φ = 60610555010050.

The previous prime is 121221110020099. The next prime is 121221110020159. The reversal of 121221110020102 is 201020011122121.

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, 30305277505024 + ... + 30305277505027.

It is an arithmetic number, because the mean of its divisors is an integer number (45457916257539).

Almost surely, 2^{121221110020102} is an apocalyptic number.

121221110020102 is a deficient number, since it is larger than the sum of its proper divisors (60610555010054).

121221110020102 is an equidigital number, since it uses as much as digits as its factorization.

121221110020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610555010053.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121221110020102 its reverse (201020011122121), we get a palindrome (322241121142223).

The spelling of 121221110020102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, twenty thousand, one hundred two".