22012011 has 12 divisors (see below), whose sum is σ = 36337392. Its totient is φ = 12578256.

The previous prime is 22011967. The next prime is 22012019. The reversal of 22012011 is 11021022.

It is not a de Polignac number, because 22012011 - 2⁷ = 22011883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22011984 and 22012002.

It is not an unprimeable number, because it can be changed into a prime (22012019) 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, 174636 + ... + 174761.

It is an arithmetic number, because the mean of its divisors is an integer number (3028116).

Almost surely, 2^22012011 is an apocalyptic number.

22012011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22012011 is a deficient number, since it is larger than the sum of its proper divisors (14325381).

22012011 is a wasteful number, since it uses less digits than its factorization.

22012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349410 (or 349407 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 22012011 is about 4691.6959620163. The cubic root of 22012011 is about 280.2549166587.

Adding to 22012011 its reverse (11021022), we get a palindrome (33033033).

The spelling of 22012011 in words is "twenty-two million, twelve thousand, eleven".