1421971583731 has 2 divisors, whose sum is σ = 1421971583732. Its totient is φ = 1421971583730.

The previous prime is 1421971583729. The next prime is 1421971583789. The reversal of 1421971583731 is 1373851791241.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421971583731 - 2¹ = 1421971583729 is a prime.

It is a super-2 number, since 2×1421971583731² (a number of 25 digits) contains 22 as substring.

Together with 1421971583729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1421971587731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710985791865 + 710985791866.

It is an arithmetic number, because the mean of its divisors is an integer number (710985791866).

Almost surely, 2^{1421971583731} is an apocalyptic number.

1421971583731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421971583731 is an equidigital number, since it uses as much as digits as its factorization.

1421971583731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 52.

The spelling of 1421971583731 in words is "one trillion, four hundred twenty-one billion, nine hundred seventy-one million, five hundred eighty-three thousand, seven hundred thirty-one".