1231212053411 has 4 divisors (see below), whose sum is σ = 1231327877424. Its totient is φ = 1231096229400.

The previous prime is 1231212053369. The next prime is 1231212053431. The reversal of 1231212053411 is 1143502121321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231212053411 is a prime.

It is a super-2 number, since 2×1231212053411² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231212053431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57896060 + ... + 57917321.

It is an arithmetic number, because the mean of its divisors is an integer number (307831969356).

Almost surely, 2^{1231212053411} is an apocalyptic number.

1231212053411 is a deficient number, since it is larger than the sum of its proper divisors (115824013).

1231212053411 is a wasteful number, since it uses less digits than its factorization.

1231212053411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115824012.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 1231212053411 its reverse (1143502121321), we get a palindrome (2374714174732).

The spelling of 1231212053411 in words is "one trillion, two hundred thirty-one billion, two hundred twelve million, fifty-three thousand, four hundred eleven".