111231212123010 has 128 divisors (see below), whose sum is σ = 307360446234624. Its totient is φ = 25235667889920.

The previous prime is 111231212122981. The next prime is 111231212123021. The reversal of 111231212123010 is 10321212132111.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19530325 + ... + 24574295.

It is an arithmetic number, because the mean of its divisors is an integer number (2401253486208).

Almost surely, 2^{111231212123010} is an apocalyptic number.

111231212123010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111231212123010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153680223117312).

111231212123010 is an abundant number, since it is smaller than the sum of its proper divisors (196129234111614).

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

111231212123010 is a wasteful number, since it uses less digits than its factorization.

111231212123010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044768.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 111231212123010 its reverse (10321212132111), we get a palindrome (121552424255121).

The spelling of 111231212123010 in words is "one hundred eleven trillion, two hundred thirty-one billion, two hundred twelve million, one hundred twenty-three thousand, ten".