1021211019 has 12 divisors (see below), whose sum is σ = 1478448400. Its totient is φ = 679253904.

The previous prime is 1021211011. The next prime is 1021211033. The reversal of 1021211019 is 9101121201.

It is a happy number.

It is not a de Polignac number, because 1021211019 - 2³ = 1021211011 is a prime.

It is a super-2 number, since 2×1021211019² = 2085743890654036722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021210992 and 1021211010.

It is not an unprimeable number, because it can be changed into a prime (1021211011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125284 + ... + 133185.

Almost surely, 2^1021211019 is an apocalyptic number.

1021211019 is a deficient number, since it is larger than the sum of its proper divisors (457237381).

1021211019 is a wasteful number, since it uses less digits than its factorization.

1021211019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258914 (or 258911 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 1021211019 is about 31956.3924590996. The cubic root of 1021211019 is about 1007.0209308349.

It can be divided in two parts, 102 and 1211019, that added together give a palindrome (1211121).

The spelling of 1021211019 in words is "one billion, twenty-one million, two hundred eleven thousand, nineteen".