122221122021 has 40 divisors (see below), whose sum is σ = 197084954880. Its totient is φ = 75250552608.

The previous prime is 122221122013. The next prime is 122221122077. The reversal of 122221122021 is 120221122221.

It is a happy number.

It is not a de Polignac number, because 122221122021 - 2³ = 122221122013 is a prime.

It is a super-2 number, since 2×122221122021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122221121985 and 122221122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221122421) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1077085 + ... + 1185138.

It is an arithmetic number, because the mean of its divisors is an integer number (4927123872).

Almost surely, 2^122221122021 is an apocalyptic number.

It is an amenable number.

122221122021 is a deficient number, since it is larger than the sum of its proper divisors (74863832859).

122221122021 is a wasteful number, since it uses less digits than its factorization.

122221122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262287 (or 2262278 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122221122021 its reverse (120221122221), we get a palindrome (242442244242).

The spelling of 122221122021 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".