1231021401 has 8 divisors (see below), whose sum is σ = 1641578784. Its totient is φ = 820572480.

The previous prime is 1231021361. The next prime is 1231021403. The reversal of 1231021401 is 1041201321.

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

It is not a de Polignac number, because 1231021401 - 2⁷ = 1231021273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231021403) 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, 4705 + ... + 49841.

It is an arithmetic number, because the mean of its divisors is an integer number (205197348).

Almost surely, 2^1231021401 is an apocalyptic number.

It is an amenable number.

1231021401 is a deficient number, since it is larger than the sum of its proper divisors (410557383).

1231021401 is an equidigital number, since it uses as much as digits as its factorization.

1231021401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54231.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1231021401 is about 35085.9145669598. The cubic root of 1231021401 is about 1071.7377651920.

Adding to 1231021401 its reverse (1041201321), we get a palindrome (2272222722).

The spelling of 1231021401 in words is "one billion, two hundred thirty-one million, twenty-one thousand, four hundred one".