1243102013421 has 32 divisors (see below), whose sum is σ = 1825102126080. Its totient is φ = 749108448000.

The previous prime is 1243102013347. The next prime is 1243102013431.

1243102013421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1243102013421 - 2⁹ = 1243102012909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243102013391 and 1243102013400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243102013431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 656595 + ... + 1708016.

It is an arithmetic number, because the mean of its divisors is an integer number (57034441440).

Almost surely, 2^{1243102013421} is an apocalyptic number.

It is an amenable number.

1243102013421 is a deficient number, since it is larger than the sum of its proper divisors (582000112659).

1243102013421 is a wasteful number, since it uses less digits than its factorization.

1243102013421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365057.

The product of its (nonzero) digits is 1152, while the sum is 24.

The spelling of 1243102013421 in words is "one trillion, two hundred forty-three billion, one hundred two million, thirteen thousand, four hundred twenty-one".