1021411971 has 16 divisors (see below), whose sum is σ = 1530208800. Its totient is φ = 673288704.

The previous prime is 1021411949. The next prime is 1021412009. The reversal of 1021411971 is 1791141201.

It is not a de Polignac number, because 1021411971 - 2⁶ = 1021411907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1021411921) 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 15 ways as a sum of consecutive naturals, for example, 210126 + ... + 214931.

It is an arithmetic number, because the mean of its divisors is an integer number (95638050).

Almost surely, 2^1021411971 is an apocalyptic number.

1021411971 is a deficient number, since it is larger than the sum of its proper divisors (508796829).

1021411971 is an equidigital number, since it uses as much as digits as its factorization.

1021411971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425155 (or 425149 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 1021411971 is about 31959.5364640978. The cubic root of 1021411971 is about 1007.0869797364.

The spelling of 1021411971 in words is "one billion, twenty-one million, four hundred eleven thousand, nine hundred seventy-one".