1242413121 has 16 divisors (see below), whose sum is σ = 1733431104. Its totient is φ = 790680384.

The previous prime is 1242413113. The next prime is 1242413131. The reversal of 1242413121 is 1213142421.

It is not a de Polignac number, because 1242413121 - 2³ = 1242413113 is a prime.

It is a super-3 number, since 3×1242413121³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242413101) 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, 99711 + ... + 111476.

It is an arithmetic number, because the mean of its divisors is an integer number (108339444).

Almost surely, 2^1242413121 is an apocalyptic number.

It is an amenable number.

1242413121 is a deficient number, since it is larger than the sum of its proper divisors (491017983).

1242413121 is a wasteful number, since it uses less digits than its factorization.

1242413121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211280.

The product of its digits is 384, while the sum is 21.

The square root of 1242413121 is about 35247.8810852511. The cubic root of 1242413121 is about 1075.0335294391.

Adding to 1242413121 its reverse (1213142421), we get a palindrome (2455555542).

The spelling of 1242413121 in words is "one billion, two hundred forty-two million, four hundred thirteen thousand, one hundred twenty-one".