1242031210521 has 8 divisors (see below), whose sum is σ = 1656051403584. Its totient is φ = 828015912240.

The previous prime is 1242031210477. The next prime is 1242031210523. The reversal of 1242031210521 is 1250121302421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242031210521 - 2³⁸ = 967153303577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242031210491 and 1242031210500.

It is not an unprimeable number, because it can be changed into a prime (1242031210523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583821 + ... + 1680746.

It is an arithmetic number, because the mean of its divisors is an integer number (207006425448).

Almost surely, 2^{1242031210521} is an apocalyptic number.

It is an amenable number.

1242031210521 is a deficient number, since it is larger than the sum of its proper divisors (414020193063).

1242031210521 is a wasteful number, since it uses less digits than its factorization.

1242031210521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447391.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 1242031210521 its reverse (1250121302421), we get a palindrome (2492152512942).

The spelling of 1242031210521 in words is "one trillion, two hundred forty-two billion, thirty-one million, two hundred ten thousand, five hundred twenty-one".