1211212312120 has 16 divisors (see below), whose sum is σ = 2725227702360. Its totient is φ = 484484924832.

The previous prime is 1211212312111. The next prime is 1211212312147. The reversal of 1211212312120 is 212132121121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15140153862 + ... + 15140153941.

Almost surely, 2^{1211212312120} is an apocalyptic number.

1211212312120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211212312120 is an abundant number, since it is smaller than the sum of its proper divisors (1514015390240).

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

1211212312120 is a wasteful number, since it uses less digits than its factorization.

1211212312120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30280307814 (or 30280307810 counting only the distinct ones).

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

Adding to 1211212312120 its reverse (212132121121), we get a palindrome (1423344433241).

The spelling of 1211212312120 in words is "one trillion, two hundred eleven billion, two hundred twelve million, three hundred twelve thousand, one hundred twenty".