10400121503 has 2 divisors, whose sum is σ = 10400121504. Its totient is φ = 10400121502.

The previous prime is 10400121493. The next prime is 10400121517. The reversal of 10400121503 is 30512100401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10400121503 - 2⁸ = 10400121247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10400121533) 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, 5200060751 + 5200060752.

It is an arithmetic number, because the mean of its divisors is an integer number (5200060752).

Almost surely, 2^10400121503 is an apocalyptic number.

10400121503 is a deficient number, since it is larger than the sum of its proper divisors (1).

10400121503 is an equidigital number, since it uses as much as digits as its factorization.

10400121503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 10400121503 its reverse (30512100401), we get a palindrome (40912221904).

The spelling of 10400121503 in words is "ten billion, four hundred million, one hundred twenty-one thousand, five hundred three".