1211112232120 has 128 divisors (see below), whose sum is σ = 3253483376640. Its totient is φ = 397001963520.

The previous prime is 1211112232111. The next prime is 1211112232129. The reversal of 1211112232120 is 212322111121.

It is an interprime number because it is at equal distance from previous prime (1211112232111) and next prime (1211112232129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211112232129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120097 + ... + 1560976.

It is an arithmetic number, because the mean of its divisors is an integer number (25417838880).

Almost surely, 2^{1211112232120} is an apocalyptic number.

1211112232120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211112232120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626741688320).

1211112232120 is an abundant number, since it is smaller than the sum of its proper divisors (2042371144520).

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

1211112232120 is a wasteful number, since it uses less digits than its factorization.

1211112232120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681205 (or 1681201 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211112232120 its reverse (212322111121), we get a palindrome (1423434343241).

The spelling of 1211112232120 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred thirty-two thousand, one hundred twenty".