1243500053421 has 16 divisors (see below), whose sum is σ = 1668386236608. Its totient is φ = 823813689600.

The previous prime is 1243500053401. The next prime is 1243500053441.

1243500053421 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1243500053401) and next prime (1243500053441).

It is not a de Polignac number, because 1243500053421 - 2⁷ = 1243500053293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243500053401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102291 + ... + 1580336.

It is an arithmetic number, because the mean of its divisors is an integer number (104274139788).

Almost surely, 2^{1243500053421} is an apocalyptic number.

It is an amenable number.

1243500053421 is a deficient number, since it is larger than the sum of its proper divisors (424886183187).

1243500053421 is a wasteful number, since it uses less digits than its factorization.

1243500053421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684172.

The product of its (nonzero) digits is 14400, while the sum is 30.

It can be divided in two parts, 12435000 and 53421, that added together give a palindrome (12488421).

The spelling of 1243500053421 in words is "one trillion, two hundred forty-three billion, five hundred million, fifty-three thousand, four hundred twenty-one".