111212011221010 has 32 divisors (see below), whose sum is σ = 229604911499520. Its totient is φ = 37992179587392.

The previous prime is 111212011220969. The next prime is 111212011221013. The reversal of 111212011221010 is 10122110212111.

It is a super-2 number, since 2×111212011221010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111212011221013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2867747790 + ... + 2867786569.

It is an arithmetic number, because the mean of its divisors is an integer number (7175153484360).

Almost surely, 2^{111212011221010} is an apocalyptic number.

111212011221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212011221010 is an abundant number, since it is smaller than the sum of its proper divisors (118392900278510).

111212011221010 is a wasteful number, since it uses less digits than its factorization.

111212011221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735534650.

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

Adding to 111212011221010 its reverse (10122110212111), we get a palindrome (121334121433121).

The spelling of 111212011221010 in words is "one hundred eleven trillion, two hundred twelve billion, eleven million, two hundred twenty-one thousand, ten".