103121132221 has 12 divisors (see below), whose sum is σ = 105459895872. Its totient is φ = 100833180728.

The previous prime is 103121132207. The next prime is 103121132239. The reversal of 103121132221 is 122231121301.

It is not a de Polignac number, because 103121132221 - 2¹¹ = 103121130173 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 (103121132291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2415366 + ... + 2457688.

It is an arithmetic number, because the mean of its divisors is an integer number (8788324656).

Almost surely, 2^103121132221 is an apocalyptic number.

It is an amenable number.

103121132221 is a deficient number, since it is larger than the sum of its proper divisors (2338763651).

103121132221 is an equidigital number, since it uses as much as digits as its factorization.

103121132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43520 (or 43473 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 103121132221 its reverse (122231121301), we get a palindrome (225352253522).

The spelling of 103121132221 in words is "one hundred three billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty-one".