120842001551 has 4 divisors (see below), whose sum is σ = 120853740672. Its totient is φ = 120830262432.

The previous prime is 120842001547. The next prime is 120842001563. The reversal of 120842001551 is 155100248021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120842001551 - 2² = 120842001547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120842001451) 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, 5854106 + ... + 5874711.

It is an arithmetic number, because the mean of its divisors is an integer number (30213435168).

Almost surely, 2^120842001551 is an apocalyptic number.

120842001551 is a deficient number, since it is larger than the sum of its proper divisors (11739121).

120842001551 is a wasteful number, since it uses less digits than its factorization.

120842001551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11739120.

The product of its (nonzero) digits is 3200, while the sum is 29.

Adding to 120842001551 its reverse (155100248021), we get a palindrome (275942249572).

The spelling of 120842001551 in words is "one hundred twenty billion, eight hundred forty-two million, one thousand, five hundred fifty-one".