1231122021159 has 16 divisors (see below), whose sum is σ = 1656145260000. Its totient is φ = 813424475136.

The previous prime is 1231122021149. The next prime is 1231122021161. The reversal of 1231122021159 is 9511202211321.

It is not a de Polignac number, because 1231122021159 - 2²⁰ = 1231120972583 is a prime.

It is a super-2 number, since 2×1231122021159² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231122021149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4702977 + ... + 4957845.

It is an arithmetic number, because the mean of its divisors is an integer number (103509078750).

Almost surely, 2^{1231122021159} is an apocalyptic number.

1231122021159 is a deficient number, since it is larger than the sum of its proper divisors (425023238841).

1231122021159 is a wasteful number, since it uses less digits than its factorization.

1231122021159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269234.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 1231122021159 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-two million, twenty-one thousand, one hundred fifty-nine".