111221101001010 has 256 divisors, whose sum is σ = 368082779516928. Its totient is φ = 20756547302400.

The previous prime is 111221101001009. The next prime is 111221101001027. The reversal of 111221101001010 is 10100101122111.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 48938436 + ... + 51160655.

It is an arithmetic number, because the mean of its divisors is an integer number (1437823357488).

Almost surely, 2^{111221101001010} is an apocalyptic number.

111221101001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221101001010 is an abundant number, since it is smaller than the sum of its proper divisors (256861678515918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111221101001010 is a wasteful number, since it uses less digits than its factorization.

111221101001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100099169.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111221101001010 its reverse (10100101122111), we get a palindrome (121321202123121).

The spelling of 111221101001010 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred one million, one thousand, ten".