1542020121401 has 4 divisors (see below), whose sum is σ = 1542461837904. Its totient is φ = 1541578404900.

The previous prime is 1542020121377. The next prime is 1542020121413. The reversal of 1542020121401 is 1041210202451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542020121401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542020121491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220853015 + ... + 220859996.

It is an arithmetic number, because the mean of its divisors is an integer number (385615459476).

Almost surely, 2^{1542020121401} is an apocalyptic number.

It is an amenable number.

1542020121401 is a deficient number, since it is larger than the sum of its proper divisors (441716503).

1542020121401 is an equidigital number, since it uses as much as digits as its factorization.

1542020121401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441716502.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 1542020121401 its reverse (1041210202451), we get a palindrome (2583230323852).

The spelling of 1542020121401 in words is "one trillion, five hundred forty-two billion, twenty million, one hundred twenty-one thousand, four hundred one".