215121421032 has 32 divisors (see below), whose sum is σ = 614632632000. Its totient is φ = 61463263104.

The previous prime is 215121421019. The next prime is 215121421033. The reversal of 215121421032 is 230124121512.

It is a happy number.

215121421032 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 (24).

It is a junction number, because it is equal to n+sod(n) for n = 215121420993 and 215121421011.

It is not an unprimeable number, because it can be changed into a prime (215121421033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640242157 + ... + 640242492.

It is an arithmetic number, because the mean of its divisors is an integer number (19207269750).

Almost surely, 2^215121421032 is an apocalyptic number.

It is an amenable number.

215121421032 is an abundant number, since it is smaller than the sum of its proper divisors (399511210968).

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

215121421032 is a wasteful number, since it uses less digits than its factorization.

215121421032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280484665 (or 1280484661 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 215121421032 its reverse (230124121512), we get a palindrome (445245542544).

The spelling of 215121421032 in words is "two hundred fifteen billion, one hundred twenty-one million, four hundred twenty-one thousand, thirty-two".