1016212021 has 8 divisors (see below), whose sum is σ = 1108857024. Its totient is φ = 923610720.

The previous prime is 1016211923. The next prime is 1016212033. The reversal of 1016212021 is 1202126101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1016212021 - 2⁷ = 1016211893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1016211986 and 1016212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016212091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55056 + ... + 71158.

It is an arithmetic number, because the mean of its divisors is an integer number (138607128).

Almost surely, 2^1016212021 is an apocalyptic number.

1016212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1016212021 is a deficient number, since it is larger than the sum of its proper divisors (92645003).

1016212021 is a wasteful number, since it uses less digits than its factorization.

1016212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21851.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1016212021 is about 31878.0805727070. The cubic root of 1016212021 is about 1005.3750639236.

Adding to 1016212021 its reverse (1202126101), we get a palindrome (2218338122).

The spelling of 1016212021 in words is "one billion, sixteen million, two hundred twelve thousand, twenty-one".