1401423031021 has 4 divisors (see below), whose sum is σ = 1509224802652. Its totient is φ = 1293621259392.

The previous prime is 1401423031003. The next prime is 1401423031039. The reversal of 1401423031021 is 1201303241041.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1401423031003) and next prime (1401423031039).

It can be written as a sum of positive squares in 2 ways, for example, as 254626206025 + 1146796824996 = 504605^2 + 1070886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401423031021 - 2⁹ = 1401423030509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401423030983 and 1401423031001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401423031091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53900885796 + ... + 53900885821.

It is an arithmetic number, because the mean of its divisors is an integer number (377306200663).

Almost surely, 2^{1401423031021} is an apocalyptic number.

It is an amenable number.

1401423031021 is a deficient number, since it is larger than the sum of its proper divisors (107801771631).

1401423031021 is a wasteful number, since it uses less digits than its factorization.

1401423031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107801771630.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1401423031021 its reverse (1201303241041), we get a palindrome (2602726272062).

The spelling of 1401423031021 in words is "one trillion, four hundred one billion, four hundred twenty-three million, thirty-one thousand, twenty-one".