12102220021 has 8 divisors (see below), whose sum is σ = 12367966464. Its totient is φ = 11836817520.

The previous prime is 12102219973. The next prime is 12102220027. The reversal of 12102220021 is 12002220121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12102220021 - 2²⁹ = 11565349109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102219983 and 12102220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102220027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14190 + ... + 156223.

It is an arithmetic number, because the mean of its divisors is an integer number (1545995808).

Almost surely, 2^12102220021 is an apocalyptic number.

It is an amenable number.

12102220021 is a deficient number, since it is larger than the sum of its proper divisors (265746443).

12102220021 is a wasteful number, since it uses less digits than its factorization.

12102220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171971.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12102220021 its reverse (12002220121), we get a palindrome (24104440142).

The spelling of 12102220021 in words is "twelve billion, one hundred two million, two hundred twenty thousand, twenty-one".