1212311021131 has 8 divisors (see below), whose sum is σ = 1419290951904. Its totient is φ = 1013779250880.

The previous prime is 1212311021099. The next prime is 1212311021143. The reversal of 1212311021131 is 1311201132121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212311021131 - 2⁵ = 1212311021099 is a prime.

It is a super-2 number, since 2×1212311021131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212311021099 and 1212311021108.

It is not an unprimeable number, because it can be changed into a prime (1212311021171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2112039820 + ... + 2112040393.

It is an arithmetic number, because the mean of its divisors is an integer number (177411368988).

Almost surely, 2^{1212311021131} is an apocalyptic number.

1212311021131 is a deficient number, since it is larger than the sum of its proper divisors (206979930773).

1212311021131 is an equidigital number, since it uses as much as digits as its factorization.

1212311021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224080261.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1212311021131 its reverse (1311201132121), we get a palindrome (2523512153252).

The spelling of 1212311021131 in words is "one trillion, two hundred twelve billion, three hundred eleven million, twenty-one thousand, one hundred thirty-one".