1022120421 has 32 divisors (see below), whose sum is σ = 1602478080. Its totient is φ = 567394176.

The previous prime is 1022120417. The next prime is 1022120431. The reversal of 1022120421 is 1240212201.

It is not a de Polignac number, because 1022120421 - 2² = 1022120417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1022120421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022120401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131440 + ... + 138998.

It is an arithmetic number, because the mean of its divisors is an integer number (50077440).

Almost surely, 2^1022120421 is an apocalyptic number.

It is an amenable number.

1022120421 is a deficient number, since it is larger than the sum of its proper divisors (580357659).

1022120421 is a wasteful number, since it uses less digits than its factorization.

1022120421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7753.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1022120421 is about 31970.6180891143. The cubic root of 1022120421 is about 1007.3197639933.

Adding to 1022120421 its reverse (1240212201), we get a palindrome (2262332622).

The spelling of 1022120421 in words is "one billion, twenty-two million, one hundred twenty thousand, four hundred twenty-one".