121111111111022 has 4 divisors (see below), whose sum is σ = 181666666666536. Its totient is φ = 60555555555510.

The previous prime is 121111111111021. The next prime is 121111111111031. The reversal of 121111111111022 is 220111111111121.

It is a happy number.

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 (121111111111021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30277777777754 + ... + 30277777777757.

It is an arithmetic number, because the mean of its divisors is an integer number (45416666666634).

Almost surely, 2^{121111111111022} is an apocalyptic number.

121111111111022 is a deficient number, since it is larger than the sum of its proper divisors (60555555555514).

121111111111022 is an equidigital number, since it uses as much as digits as its factorization.

121111111111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60555555555513.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 121111111111022 its reverse (220111111111121), we get a palindrome (341222222222143).

Subtracting 121111111111022 from its reverse (220111111111121), we obtain a palindrome (99000000000099).

The spelling of 121111111111022 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, twenty-two".