150211212121 has 4 divisors (see below), whose sum is σ = 150212132532. Its totient is φ = 150210291712.

The previous prime is 150211212119. The next prime is 150211212127. The reversal of 150211212121 is 121212112051.

150211212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 94901579721 + 55309632400 = 308061^2 + 235180^2 .

It is a cyclic number.

It is not a de Polignac number, because 150211212121 - 2¹ = 150211212119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150211212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142120 + ... + 566233.

It is an arithmetic number, because the mean of its divisors is an integer number (37553033133).

Almost surely, 2^150211212121 is an apocalyptic number.

It is an amenable number.

150211212121 is a deficient number, since it is larger than the sum of its proper divisors (920411).

150211212121 is an equidigital number, since it uses as much as digits as its factorization.

150211212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920410.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 150211212121 its reverse (121212112051), we get a palindrome (271423324172).

The spelling of 150211212121 in words is "one hundred fifty billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty-one".