1000022011 has 4 divisors (see below), whose sum is σ = 1000156392. Its totient is φ = 999887632.

The previous prime is 1000021987. The next prime is 1000022027. The reversal of 1000022011 is 1102200001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102200001 = 7 ⋅157457143.

It is a cyclic number.

It is not a de Polignac number, because 1000022011 - 2²³ = 991633403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000021985 and 1000022003.

It is not an unprimeable number, because it can be changed into a prime (1000022071) 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, 55330 + ... + 71143.

It is an arithmetic number, because the mean of its divisors is an integer number (250039098).

Almost surely, 2^1000022011 is an apocalyptic number.

1000022011 is a deficient number, since it is larger than the sum of its proper divisors (134381).

1000022011 is an equidigital number, since it uses as much as digits as its factorization.

1000022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134380.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1000022011 is about 31623.1246242366. The cubic root of 1000022011 is about 1000.0073369462.

Adding to 1000022011 its reverse (1102200001), we get a palindrome (2102222012).

The spelling of 1000022011 in words is "one billion, twenty-two thousand, eleven".