1224155134021 has 8 divisors (see below), whose sum is σ = 1293031080704. Its totient is φ = 1157115879360.

The previous prime is 1224155134019. The next prime is 1224155134031. The reversal of 1224155134021 is 1204315514221.

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 1224155134021 - 2¹ = 1224155134019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224155134031) 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, 459171636 + ... + 459174301.

It is an arithmetic number, because the mean of its divisors is an integer number (161628885088).

Almost surely, 2^{1224155134021} is an apocalyptic number.

It is an amenable number.

1224155134021 is a deficient number, since it is larger than the sum of its proper divisors (68875946683).

1224155134021 is an equidigital number, since it uses as much as digits as its factorization.

1224155134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918346011.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 1224155134021 in words is "one trillion, two hundred twenty-four billion, one hundred fifty-five million, one hundred thirty-four thousand, twenty-one".