1021213011 has 16 divisors (see below), whose sum is σ = 1675837184. Its totient is φ = 538661664.

The previous prime is 1021212991. The next prime is 1021213031. The reversal of 1021213011 is 1103121201.

It is an interprime number because it is at equal distance from previous prime (1021212991) and next prime (1021213031).

It is not a de Polignac number, because 1021213011 - 2⁶ = 1021212947 is a prime.

It is a super-2 number, since 2×1021213011² = 2085752027671372242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021213031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1870081 + ... + 1870626.

It is an arithmetic number, because the mean of its divisors is an integer number (104739824).

Almost surely, 2^1021213011 is an apocalyptic number.

1021213011 is a deficient number, since it is larger than the sum of its proper divisors (654624173).

1021213011 is a wasteful number, since it uses less digits than its factorization.

1021213011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740730.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1021213011 is about 31956.4236265575. The cubic root of 1021213011 is about 1007.0215856079.

Adding to 1021213011 its reverse (1103121201), we get a palindrome (2124334212).

The spelling of 1021213011 in words is "one billion, twenty-one million, two hundred thirteen thousand, eleven".