122102010220021 has 8 divisors (see below), whose sum is σ = 139229441518104. Its totient is φ = 106079574489600.

The previous prime is 122102010219947. The next prime is 122102010220031. The reversal of 122102010220021 is 120022010201221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11136643539921 + 110965366680100 = 3337161^2 + 10534010^2 .

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 122102010220021 - 2¹⁵ = 122102010187253 is a prime.

It is a super-2 number, since 2×122102010220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122102010219977 and 122102010220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122102010220031) 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, 276248891680 + ... + 276248892121.

It is an arithmetic number, because the mean of its divisors is an integer number (17403680189763).

Almost surely, 2^{122102010220021} is an apocalyptic number.

It is an amenable number.

122102010220021 is a deficient number, since it is larger than the sum of its proper divisors (17127431298083).

122102010220021 is a wasteful number, since it uses less digits than its factorization.

122102010220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552497783831.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122102010220021 its reverse (120022010201221), we get a palindrome (242124020421242).

The spelling of 122102010220021 in words is "one hundred twenty-two trillion, one hundred two billion, ten million, two hundred twenty thousand, twenty-one".