1231322101 has 8 divisors (see below), whose sum is σ = 1241734208. Its totient is φ = 1220940000.

The previous prime is 1231322041. The next prime is 1231322111. The reversal of 1231322101 is 1012231321.

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 1231322101 - 2¹⁵ = 1231289333 is a prime.

It is a super-2 number, since 2×1231322101² = 3032308232822108402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231322111) 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, 79081 + ... + 93361.

It is an arithmetic number, because the mean of its divisors is an integer number (155216776).

Almost surely, 2^1231322101 is an apocalyptic number.

It is an amenable number.

1231322101 is a deficient number, since it is larger than the sum of its proper divisors (10412107).

1231322101 is a wasteful number, since it uses less digits than its factorization.

1231322101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15003.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1231322101 is about 35090.1995007153. The cubic root of 1231322101 is about 1071.8250220853.

Adding to 1231322101 its reverse (1012231321), we get a palindrome (2243553422).

The spelling of 1231322101 in words is "one billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred one".