111021112121010 has 64 divisors (see below), whose sum is σ = 327939285042432. Its totient is φ = 23424234644736.

The previous prime is 111021112120979. The next prime is 111021112121027. The reversal of 111021112121010 is 10121211120111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20333534289 + ... + 20333539748.

It is an arithmetic number, because the mean of its divisors is an integer number (5124051328788).

Almost surely, 2^{111021112121010} is an apocalyptic number.

111021112121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111021112121010 is an abundant number, since it is smaller than the sum of its proper divisors (216918172921422).

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

111021112121010 is a wasteful number, since it uses less digits than its factorization.

111021112121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40667074067.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111021112121010 its reverse (10121211120111), we get a palindrome (121142323241121).

The spelling of 111021112121010 in words is "one hundred eleven trillion, twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, ten".