121111122010 has 16 divisors (see below), whose sum is σ = 218362759272. Its totient is φ = 48363840000.

The previous prime is 121111121953. The next prime is 121111122017. The reversal of 121111122010 is 10221111121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 113475333321 + 7635788689 = 336861^2 + 87383^2 .

It is a super-2 number, since 2×121111122010² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121111122017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10069791 + ... + 10081810.

Almost surely, 2^121111122010 is an apocalyptic number.

121111122010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111122010 is a deficient number, since it is larger than the sum of its proper divisors (97251637262).

121111122010 is a wasteful number, since it uses less digits than its factorization.

121111122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20152209.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121111122010 its reverse (10221111121), we get a palindrome (131332233131).

The spelling of 121111122010 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, ten".