1401213023431 has 4 divisors (see below), whose sum is σ = 1508998640632. Its totient is φ = 1293427406232.

The previous prime is 1401213023411. The next prime is 1401213023459. The reversal of 1401213023431 is 1343203121041.

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

It is not a de Polignac number, because 1401213023431 - 2¹⁹ = 1401212499143 is a prime.

It is a super-2 number, since 2×1401213023431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401213023396 and 1401213023405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401213023411) 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, 53892808581 + ... + 53892808606.

It is an arithmetic number, because the mean of its divisors is an integer number (377249660158).

Almost surely, 2^{1401213023431} is an apocalyptic number.

1401213023431 is a deficient number, since it is larger than the sum of its proper divisors (107785617201).

1401213023431 is a wasteful number, since it uses less digits than its factorization.

1401213023431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107785617200.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1401213023431 its reverse (1343203121041), we get a palindrome (2744416144472).

The spelling of 1401213023431 in words is "one trillion, four hundred one billion, two hundred thirteen million, twenty-three thousand, four hundred thirty-one".