1400401322921 has 2 divisors, whose sum is σ = 1400401322922. Its totient is φ = 1400401322920.

The previous prime is 1400401322891. The next prime is 1400401322941. The reversal of 1400401322921 is 1292231040041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1397511722896 + 2889600025 = 1182164^2 + 53755^2 .

It is an emirp because it is prime and its reverse (1292231040041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400401322921 - 2³⁰ = 1399327581097 is a prime.

It is a super-2 number, since 2×1400401322921² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1400401322941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700200661460 + 700200661461.

It is an arithmetic number, because the mean of its divisors is an integer number (700200661461).

Almost surely, 2^{1400401322921} is an apocalyptic number.

It is an amenable number.

1400401322921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400401322921 is an equidigital number, since it uses as much as digits as its factorization.

1400401322921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 1400401322921 its reverse (1292231040041), we get a palindrome (2692632362962).

The spelling of 1400401322921 in words is "one trillion, four hundred billion, four hundred one million, three hundred twenty-two thousand, nine hundred twenty-one".