1223171771157 has 64 divisors (see below), whose sum is σ = 2086173350400. Its totient is φ = 693835683840.

The previous prime is 1223171771113. The next prime is 1223171771177. The reversal of 1223171771157 is 7511771713221.

1223171771157 is a `hidden beast` number, since 12 + 2 + 317 + 177 + 1 + 157 = 666.

It is not a de Polignac number, because 1223171771157 - 2¹⁰ = 1223171770133 is a prime.

It is a super-3 number, since 3×1223171771157³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223171771177) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31701157 + ... + 31739717.

It is an arithmetic number, because the mean of its divisors is an integer number (32596458600).

Almost surely, 2^{1223171771157} is an apocalyptic number.

It is an amenable number.

1223171771157 is a deficient number, since it is larger than the sum of its proper divisors (863001579243).

1223171771157 is a wasteful number, since it uses less digits than its factorization.

1223171771157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39803 (or 39797 counting only the distinct ones).

The product of its digits is 144060, while the sum is 45.

The spelling of 1223171771157 in words is "one trillion, two hundred twenty-three billion, one hundred seventy-one million, seven hundred seventy-one thousand, one hundred fifty-seven".