1211230123320 has 128 divisors (see below), whose sum is σ = 4153118054400. Its totient is φ = 276830662656.

The previous prime is 1211230123273. The next prime is 1211230123331. The reversal of 1211230123320 is 233210321121.

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

It is a congruent number.

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, 12085576 + ... + 12185384.

It is an arithmetic number, because the mean of its divisors is an integer number (32446234800).

Almost surely, 2^{1211230123320} is an apocalyptic number.

1211230123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211230123320 is an abundant number, since it is smaller than the sum of its proper divisors (2941887931080).

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

1211230123320 is a wasteful number, since it uses less digits than its factorization.

1211230123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114277 (or 114273 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1211230123320 its reverse (233210321121), we get a palindrome (1444440444441).

The spelling of 1211230123320 in words is "one trillion, two hundred eleven billion, two hundred thirty million, one hundred twenty-three thousand, three hundred twenty".