151221342042 has 32 divisors (see below), whose sum is σ = 336130421760. Its totient is φ = 50394664800.

The previous prime is 151221342001. The next prime is 151221342059. The reversal of 151221342042 is 240243122151.

151221342042 is a `hidden beast` number, since 15 + 1 + 221 + 3 + 420 + 4 + 2 = 666.

151221342042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 151221341997 and 151221342015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123834 + ... + 563717.

It is an arithmetic number, because the mean of its divisors is an integer number (10504075680).

Almost surely, 2^151221342042 is an apocalyptic number.

151221342042 is an abundant number, since it is smaller than the sum of its proper divisors (184909079718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151221342042 is a wasteful number, since it uses less digits than its factorization.

151221342042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691635 (or 691629 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 151221342042 its reverse (240243122151), we get a palindrome (391464464193).

The spelling of 151221342042 in words is "one hundred fifty-one billion, two hundred twenty-one million, three hundred forty-two thousand, forty-two".