121121220111010 has 32 divisors (see below), whose sum is σ = 249165347260032. Its totient is φ = 41526993056640.

The previous prime is 121121220110923. The next prime is 121121220111041. The reversal of 121121220111010 is 10111022121121.

It is a super-2 number, since 2×121121220111010² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4616094 + ... + 16234246.

It is an arithmetic number, because the mean of its divisors is an integer number (7786417101876).

Almost surely, 2^{121121220111010} is an apocalyptic number.

121121220111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121220111010 is an abundant number, since it is smaller than the sum of its proper divisors (128044127149022).

121121220111010 is a wasteful number, since it uses less digits than its factorization.

121121220111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11767098.

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

Adding to 121121220111010 its reverse (10111022121121), we get a palindrome (131232242232131).

The spelling of 121121220111010 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, ten".