121111311010 has 16 divisors (see below), whose sum is σ = 218170828800. Its totient is φ = 48406642416.

The previous prime is 121111311007. The next prime is 121111311011. The reversal of 121111311010 is 10113111121.

It is not an unprimeable number, because it can be changed into a prime (121111311011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4721820 + ... + 4747399.

It is an arithmetic number, because the mean of its divisors is an integer number (13635676800).

Almost surely, 2^121111311010 is an apocalyptic number.

121111311010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111311010 is a deficient number, since it is larger than the sum of its proper divisors (97059517790).

121111311010 is a wasteful number, since it uses less digits than its factorization.

121111311010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470505.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 121111311010 its reverse (10113111121), we get a palindrome (131224422131).

The spelling of 121111311010 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred eleven thousand, ten".