121111221110102 has 4 divisors (see below), whose sum is σ = 181666831665156. Its totient is φ = 60555610555050.

The previous prime is 121111221110101. The next prime is 121111221110123. The reversal of 121111221110102 is 201011122111121.

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 (121111221110101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30277805277524 + ... + 30277805277527.

It is an arithmetic number, because the mean of its divisors is an integer number (45416707916289).

Almost surely, 2^{121111221110102} is an apocalyptic number.

121111221110102 is a deficient number, since it is larger than the sum of its proper divisors (60555610555054).

121111221110102 is an equidigital number, since it uses as much as digits as its factorization.

121111221110102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60555610555053.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121111221110102 its reverse (201011122111121), we get a palindrome (322122343221223).

The spelling of 121111221110102 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, one hundred two".