1401681221431 has 2 divisors, whose sum is σ = 1401681221432. Its totient is φ = 1401681221430.

The previous prime is 1401681221429. The next prime is 1401681221443. The reversal of 1401681221431 is 1341221861041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401681221431 - 2¹ = 1401681221429 is a prime.

It is a super-2 number, since 2×1401681221431² (a number of 25 digits) contains 22 as substring.

Together with 1401681221429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401681221531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700840610715 + 700840610716.

It is an arithmetic number, because the mean of its divisors is an integer number (700840610716).

Almost surely, 2^{1401681221431} is an apocalyptic number.

1401681221431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401681221431 is an equidigital number, since it uses as much as digits as its factorization.

1401681221431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 1401681221431 in words is "one trillion, four hundred one billion, six hundred eighty-one million, two hundred twenty-one thousand, four hundred thirty-one".