1533941394121 has 12 divisors (see below), whose sum is σ = 1641919823280. Its totient is φ = 1432688828480.

The previous prime is 1533941394109. The next prime is 1533941394137. The reversal of 1533941394121 is 1214931493351.

It is not a de Polignac number, because 1533941394121 - 2²³ = 1533933005513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1533941394521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20220751 + ... + 20296468.

It is an arithmetic number, because the mean of its divisors is an integer number (136826651940).

Almost surely, 2^{1533941394121} is an apocalyptic number.

It is an amenable number.

1533941394121 is a deficient number, since it is larger than the sum of its proper divisors (107978429159).

1533941394121 is a wasteful number, since it uses less digits than its factorization.

1533941394121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40517384 (or 40517367 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The spelling of 1533941394121 in words is "one trillion, five hundred thirty-three billion, nine hundred forty-one million, three hundred ninety-four thousand, one hundred twenty-one".