1231122021163 has 8 divisors (see below), whose sum is σ = 1239225913728. Its totient is φ = 1223043815424.

The previous prime is 1231122021161. The next prime is 1231122021251. The reversal of 1231122021163 is 3611202211321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231122021163 - 2¹ = 1231122021161 is a prime.

It is a super-2 number, since 2×1231122021163² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231122021161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6325531 + ... + 6517252.

It is an arithmetic number, because the mean of its divisors is an integer number (154903239216).

Almost surely, 2^{1231122021163} is an apocalyptic number.

1231122021163 is a deficient number, since it is larger than the sum of its proper divisors (8103892565).

1231122021163 is a wasteful number, since it uses less digits than its factorization.

1231122021163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12843413.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 1231122021163 its reverse (3611202211321), we get a palindrome (4842324232484).

The spelling of 1231122021163 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-two million, twenty-one thousand, one hundred sixty-three".