1021412421 has 12 divisors (see below), whose sum is σ = 1476264972. Its totient is φ = 680530176.

The previous prime is 1021412407. The next prime is 1021412429. The reversal of 1021412421 is 1242141201.

1021412421 is a `hidden beast` number, since 102 + 141 + 2 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 475676100 + 545736321 = 21810^2 + 23361^2 .

It is not a de Polignac number, because 1021412421 - 2⁵ = 1021412389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021412394 and 1021412403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021412429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18166 + ... + 48711.

It is an arithmetic number, because the mean of its divisors is an integer number (123022081).

Almost surely, 2^1021412421 is an apocalyptic number.

It is an amenable number.

1021412421 is a deficient number, since it is larger than the sum of its proper divisors (454852551).

1021412421 is a wasteful number, since it uses less digits than its factorization.

1021412421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68580 (or 68577 counting only the distinct ones).

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

The square root of 1021412421 is about 31959.5435042492. The cubic root of 1021412421 is about 1007.0871276326.

Adding to 1021412421 its reverse (1242141201), we get a palindrome (2263553622).

The spelling of 1021412421 in words is "one billion, twenty-one million, four hundred twelve thousand, four hundred twenty-one".