1211101331230 has 64 divisors (see below), whose sum is σ = 2596993850880. Its totient is φ = 397855785600.

The previous prime is 1211101331203. The next prime is 1211101331239. The reversal of 1211101331230 is 321331011121.

It is a junction number, because it is equal to n+sod(n) for n = 1211101331198 and 1211101331207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211101331239) 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, 2011176 + ... + 2543035.

It is an arithmetic number, because the mean of its divisors is an integer number (40578028920).

Almost surely, 2^{1211101331230} is an apocalyptic number.

1211101331230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211101331230 is an abundant number, since it is smaller than the sum of its proper divisors (1385892519650).

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

1211101331230 is a wasteful number, since it uses less digits than its factorization.

1211101331230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554385.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1211101331230 its reverse (321331011121), we get a palindrome (1532432342351).

The spelling of 1211101331230 in words is "one trillion, two hundred eleven billion, one hundred one million, three hundred thirty-one thousand, two hundred thirty".