1020122122221 has 8 divisors (see below), whose sum is σ = 1511292032960. Its totient is φ = 680081414796.

The previous prime is 1020122122207. The next prime is 1020122122259. The reversal of 1020122122221 is 1222212210201.

It is a happy number.

1020122122221 is a `hidden beast` number, since 1 + 0 + 201 + 221 + 22 + 221 = 666.

It is not a de Polignac number, because 1020122122221 - 2⁹ = 1020122121709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020122122194 and 1020122122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020122122021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18891150385 + ... + 18891150438.

It is an arithmetic number, because the mean of its divisors is an integer number (188911504120).

Almost surely, 2^{1020122122221} is an apocalyptic number.

It is an amenable number.

1020122122221 is a deficient number, since it is larger than the sum of its proper divisors (491169910739).

1020122122221 is an equidigital number, since it uses as much as digits as its factorization.

1020122122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37782300832 (or 37782300826 counting only the distinct ones).

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

Adding to 1020122122221 its reverse (1222212210201), we get a palindrome (2242334332422).

The spelling of 1020122122221 in words is "one trillion, twenty billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".