111121202121010 has 16 divisors (see below), whose sum is σ = 200022197578776. Its totient is φ = 44447584457088.

The previous prime is 111121202121001. The next prime is 111121202121023. The reversal of 111121202121010 is 10121202121111.

It can be written as a sum of positive squares in 4 ways, for example, as 57102097767649 + 54019104353361 = 7556593^2 + 7349769^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111528147 + ... + 112520086.

Almost surely, 2^{111121202121010} is an apocalyptic number.

111121202121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111121202121010 is a deficient number, since it is larger than the sum of its proper divisors (88900995457766).

111121202121010 is a wasteful number, since it uses less digits than its factorization.

111121202121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224097837.

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

Adding to 111121202121010 its reverse (10121202121111), we get a palindrome (121242404242121).

The spelling of 111121202121010 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand, ten".