1212242255311 has 12 divisors (see below), whose sum is σ = 1253067994872. Its totient is φ = 1172707122000.

The previous prime is 1212242255281. The next prime is 1212242255347. The reversal of 1212242255311 is 1135522422121.

It is not a de Polignac number, because 1212242255311 - 2⁹ = 1212242254799 is a prime.

It is a super-2 number, since 2×1212242255311² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212242655311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2403996 + ... + 2864206.

It is an arithmetic number, because the mean of its divisors is an integer number (104422332906).

Almost surely, 2^{1212242255311} is an apocalyptic number.

1212242255311 is a deficient number, since it is larger than the sum of its proper divisors (40825739561).

1212242255311 is an equidigital number, since it uses as much as digits as its factorization.

1212242255311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463014 (or 462983 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

Adding to 1212242255311 its reverse (1135522422121), we get a palindrome (2347764677432).

The spelling of 1212242255311 in words is "one trillion, two hundred twelve billion, two hundred forty-two million, two hundred fifty-five thousand, three hundred eleven".