121021120102 has 4 divisors (see below), whose sum is σ = 181531680156. Its totient is φ = 60510560050.

The previous prime is 121021120091. The next prime is 121021120109. The reversal of 121021120102 is 201021120121.

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

It is a super-2 number, since 2×121021120102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021120109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30255280024 + ... + 30255280027.

It is an arithmetic number, because the mean of its divisors is an integer number (45382920039).

Almost surely, 2^121021120102 is an apocalyptic number.

121021120102 is a deficient number, since it is larger than the sum of its proper divisors (60510560054).

121021120102 is an equidigital number, since it uses as much as digits as its factorization.

121021120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60510560053.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121021120102 its reverse (201021120121), we get a palindrome (322042240223).

The spelling of 121021120102 in words is "one hundred twenty-one billion, twenty-one million, one hundred twenty thousand, one hundred two".