1281101101236 has 144 divisors (see below), whose sum is σ = 3746860685568. Its totient is φ = 364759142400.

The previous prime is 1281101101211. The next prime is 1281101101261. The reversal of 1281101101236 is 6321011011821.

It is an interprime number because it is at equal distance from previous prime (1281101101211) and next prime (1281101101261).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3831621 + ... + 4152531.

It is an arithmetic number, because the mean of its divisors is an integer number (26019865872).

Almost surely, 2^{1281101101236} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281101101236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1873430342784).

1281101101236 is an abundant number, since it is smaller than the sum of its proper divisors (2465759584332).

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

1281101101236 is a wasteful number, since it uses less digits than its factorization.

1281101101236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321542 (or 321537 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The spelling of 1281101101236 in words is "one trillion, two hundred eighty-one billion, one hundred one million, one hundred one thousand, two hundred thirty-six".