1224142102021 has 8 divisors (see below), whose sum is σ = 1226578593240. Its totient is φ = 1221707962368.

The previous prime is 1224142102013. The next prime is 1224142102063. The reversal of 1224142102021 is 1202012414221.

It can be written as a sum of positive squares in 4 ways, for example, as 94194361921 + 1129947740100 = 306911^2 + 1062990^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1224142102021 - 2³ = 1224142102013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224142101983 and 1224142102001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224142102621) 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, 456115 + ... + 1629823.

It is an arithmetic number, because the mean of its divisors is an integer number (153322324155).

Almost surely, 2^{1224142102021} is an apocalyptic number.

It is an amenable number.

1224142102021 is a deficient number, since it is larger than the sum of its proper divisors (2436491219).

1224142102021 is a wasteful number, since it uses less digits than its factorization.

1224142102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175783.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 1224142102021 its reverse (1202012414221), we get a palindrome (2426154516242).

The spelling of 1224142102021 in words is "one trillion, two hundred twenty-four billion, one hundred forty-two million, one hundred two thousand, twenty-one".