126222020 has 24 divisors (see below), whose sum is σ = 265532568. Its totient is φ = 50400000.

The previous prime is 126221989. The next prime is 126222043. The reversal of 126222020 is 20222621.

It can be written as a sum of positive squares in 4 ways, for example, as 19430464 + 106791556 = 4408^2 + 10334^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 126222020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6770 + ... + 17270.

It is an arithmetic number, because the mean of its divisors is an integer number (11063857).

Almost surely, 2^126222020 is an apocalyptic number.

126222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126222020 is an abundant number, since it is smaller than the sum of its proper divisors (139310548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126222020 is a wasteful number, since it uses less digits than its factorization.

126222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111 (or 11109 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 126222020 is about 11234.8573644706. The cubic root of 126222020 is about 501.6240790230.

Adding to 126222020 its reverse (20222621), we get a palindrome (146444641).

The spelling of 126222020 in words is "one hundred twenty-six million, two hundred twenty-two thousand, twenty".