10400121437 has 2 divisors, whose sum is σ = 10400121438. Its totient is φ = 10400121436.

The previous prime is 10400121401. The next prime is 10400121463. The reversal of 10400121437 is 73412100401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5701156036 + 4698965401 = 75506^2 + 68549^2 .

It is a cyclic number.

It is not a de Polignac number, because 10400121437 - 2²⁰ = 10399072861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10400181437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5200060718 + 5200060719.

It is an arithmetic number, because the mean of its divisors is an integer number (5200060719).

Almost surely, 2^10400121437 is an apocalyptic number.

It is an amenable number.

10400121437 is a deficient number, since it is larger than the sum of its proper divisors (1).

10400121437 is an equidigital number, since it uses as much as digits as its factorization.

10400121437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 10400121437 its reverse (73412100401), we get a palindrome (83812221838).

The spelling of 10400121437 in words is "ten billion, four hundred million, one hundred twenty-one thousand, four hundred thirty-seven".