122110122220021 has 4 divisors (see below), whose sum is σ = 131503208544652. Its totient is φ = 112717035895392.

The previous prime is 122110122220001. The next prime is 122110122220133. The reversal of 122110122220021 is 120022221011221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77041873022500 + 45068249197521 = 8777350^2 + 6713289^2 .

It is a cyclic number.

It is not a de Polignac number, because 122110122220021 - 2⁹ = 122110122219509 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 (122110122220001) 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, 4696543162296 + ... + 4696543162321.

It is an arithmetic number, because the mean of its divisors is an integer number (32875802136163).

Almost surely, 2^{122110122220021} is an apocalyptic number.

It is an amenable number.

122110122220021 is a deficient number, since it is larger than the sum of its proper divisors (9393086324631).

122110122220021 is an equidigital number, since it uses as much as digits as its factorization.

122110122220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9393086324630.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 122110122220021 its reverse (120022221011221), we get a palindrome (242132343231242).

The spelling of 122110122220021 in words is "one hundred twenty-two trillion, one hundred ten billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".