1231420001 has 16 divisors (see below), whose sum is σ = 1503528960. Its totient is φ = 985018320.

The previous prime is 1231419997. The next prime is 1231420009. The reversal of 1231420001 is 1000241321.

It is a cyclic number.

It is not a de Polignac number, because 1231420001 - 2² = 1231419997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231420009) 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, 60185 + ... + 78006.

It is an arithmetic number, because the mean of its divisors is an integer number (93970560).

Almost surely, 2^1231420001 is an apocalyptic number.

It is an amenable number.

1231420001 is a deficient number, since it is larger than the sum of its proper divisors (272108959).

1231420001 is a wasteful number, since it uses less digits than its factorization.

1231420001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138284.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1231420001 is about 35091.5944493835. The cubic root of 1231420001 is about 1071.8534275661.

Adding to 1231420001 its reverse (1000241321), we get a palindrome (2231661322).

The spelling of 1231420001 in words is "one billion, two hundred thirty-one million, four hundred twenty thousand, one".