1212311021130 has 80 divisors (see below), whose sum is σ = 3556112354784. Its totient is φ = 293893578720.

The previous prime is 1212311021099. The next prime is 1212311021143. The reversal of 1212311021130 is 311201132121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 68022012 + ... + 68039831.

Almost surely, 2^{1212311021130} is an apocalyptic number.

1212311021130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212311021130 is an abundant number, since it is smaller than the sum of its proper divisors (2343801333654).

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

1212311021130 is a wasteful number, since it uses less digits than its factorization.

1212311021130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136061873 (or 136061864 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1212311021130 its reverse (311201132121), we get a palindrome (1523512153251).

It can be divided in two parts, 12123 and 11021130, that added together give a triangular number (11033253 = T₄₆₉₇).

The spelling of 1212311021130 in words is "one trillion, two hundred twelve billion, three hundred eleven million, twenty-one thousand, one hundred thirty".