22012020011 has 4 divisors (see below), whose sum is σ = 23170547400. Its totient is φ = 20853492624.

The previous prime is 22012019999. The next prime is 22012020029. The reversal of 22012020011 is 11002021022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22012020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012019974 and 22012020001.

It is not an unprimeable number, because it can be changed into a prime (22012020031) 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, 579263666 + ... + 579263703.

It is an arithmetic number, because the mean of its divisors is an integer number (5792636850).

Almost surely, 2^22012020011 is an apocalyptic number.

22012020011 is a deficient number, since it is larger than the sum of its proper divisors (1158527389).

22012020011 is a wasteful number, since it uses less digits than its factorization.

22012020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158527388.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22012020011 its reverse (11002021022), we get a palindrome (33014041033).

The spelling of 22012020011 in words is "twenty-two billion, twelve million, twenty thousand, eleven".