1020221011 has 4 divisors (see below), whose sum is σ = 1026719392. Its totient is φ = 1013722632.

The previous prime is 1020221003. The next prime is 1020221087. The reversal of 1020221011 is 1101220201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1101220201 = 491 ⋅2242811.

It is a cyclic number.

It is not a de Polignac number, because 1020221011 - 2³ = 1020221003 is a prime.

It is a super-2 number, since 2×1020221011² = 2081701822571724242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020281011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3248955 + ... + 3249268.

It is an arithmetic number, because the mean of its divisors is an integer number (256679848).

Almost surely, 2^1020221011 is an apocalyptic number.

1020221011 is a deficient number, since it is larger than the sum of its proper divisors (6498381).

1020221011 is an equidigital number, since it uses as much as digits as its factorization.

1020221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6498380.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1020221011 is about 31940.8987193535. The cubic root of 1020221011 is about 1006.6954084572.

Adding to 1020221011 its reverse (1101220201), we get a palindrome (2121441212).

It can be divided in two parts, 10202 and 21011, that added together give a palindrome (31213).

The spelling of 1020221011 in words is "one billion, twenty million, two hundred twenty-one thousand, eleven".