1311226121552 has 20 divisors (see below), whose sum is σ = 2556682147956. Its totient is φ = 651437180160.

The previous prime is 1311226121537. The next prime is 1311226121567. The reversal of 1311226121552 is 2551216221131.

It is an interprime number because it is at equal distance from previous prime (1311226121537) and next prime (1311226121567).

It can be written as a sum of positive squares in 2 ways, for example, as 752493791296 + 558732330256 = 867464^2 + 747484^2 .

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, 260989949 + ... + 260994972.

Almost surely, 2^{1311226121552} is an apocalyptic number.

It is an amenable number.

1311226121552 is a deficient number, since it is larger than the sum of its proper divisors (1245456026404).

1311226121552 is a wasteful number, since it uses less digits than its factorization.

1311226121552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521985086 (or 521985080 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The spelling of 1311226121552 in words is "one trillion, three hundred eleven billion, two hundred twenty-six million, one hundred twenty-one thousand, five hundred fifty-two".