215421130122 has 32 divisors (see below), whose sum is σ = 482712709824. Its totient is φ = 63514828800.

The previous prime is 215421130109. The next prime is 215421130163. The reversal of 215421130122 is 221031124512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 215421130092 and 215421130101.

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, 44105079 + ... + 44109962.

It is an arithmetic number, because the mean of its divisors is an integer number (15084772182).

Almost surely, 2^215421130122 is an apocalyptic number.

215421130122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

215421130122 is an abundant number, since it is smaller than the sum of its proper divisors (267291579702).

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

215421130122 is a wasteful number, since it uses less digits than its factorization.

215421130122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88215094.

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

Adding to 215421130122 its reverse (221031124512), we get a palindrome (436452254634).

It can be divided in two parts, 215421 and 130122, that added together give a palindrome (345543).

The spelling of 215421130122 in words is "two hundred fifteen billion, four hundred twenty-one million, one hundred thirty thousand, one hundred twenty-two".