1012155635223 has 80 divisors (see below), whose sum is σ = 1536315374880. Its totient is φ = 664010784000.

The previous prime is 1012155635221. The next prime is 1012155635279. The reversal of 1012155635223 is 3225365512101.

1012155635223 is a `hidden beast` number, since 1 + 0 + 1 + 2 + 15 + 5 + 635 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 1012155635223 - 2¹ = 1012155635221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012155635221) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1772601528 + ... + 1772602098.

It is an arithmetic number, because the mean of its divisors is an integer number (19203942186).

Almost surely, 2^{1012155635223} is an apocalyptic number.

1012155635223 is a deficient number, since it is larger than the sum of its proper divisors (524159739657).

1012155635223 is a wasteful number, since it uses less digits than its factorization.

1012155635223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 1012155635223 in words is "one trillion, twelve billion, one hundred fifty-five million, six hundred thirty-five thousand, two hundred twenty-three".