12101222021 has 4 divisors (see below), whose sum is σ = 13829968032. Its totient is φ = 10372476012.

The previous prime is 12101222017. The next prime is 12101222033. The reversal of 12101222021 is 12022210121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12101222021 - 2² = 12101222017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101221987 and 12101222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101222041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864372995 + ... + 864373008.

It is an arithmetic number, because the mean of its divisors is an integer number (3457492008).

Almost surely, 2^12101222021 is an apocalyptic number.

It is an amenable number.

12101222021 is a deficient number, since it is larger than the sum of its proper divisors (1728746011).

12101222021 is an equidigital number, since it uses as much as digits as its factorization.

12101222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728746010.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12101222021 its reverse (12022210121), we get a palindrome (24123432142).

The spelling of 12101222021 in words is "twelve billion, one hundred one million, two hundred twenty-two thousand, twenty-one".