122221121210021 has 8 divisors (see below), whose sum is σ = 125065276976640. Its totient is φ = 119377047448512.

The previous prime is 122221121209973. The next prime is 122221121210039. The reversal of 122221121210021 is 120012121122221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122221121210021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122221121209975 and 122221121210002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221121210821) 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, 17480660 + ... + 23452413.

It is an arithmetic number, because the mean of its divisors is an integer number (15633159622080).

Almost surely, 2^{122221121210021} is an apocalyptic number.

It is an amenable number.

122221121210021 is a deficient number, since it is larger than the sum of its proper divisors (2844155766619).

122221121210021 is an equidigital number, since it uses as much as digits as its factorization.

122221121210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41002555.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 122221121210021 its reverse (120012121122221), we get a palindrome (242233242332242).

The spelling of 122221121210021 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred ten thousand, twenty-one".