201221122021011 has 12 divisors (see below), whose sum is σ = 290894740759480. Its totient is φ = 134035718241600.

The previous prime is 201221122020977. The next prime is 201221122021039. The reversal of 201221122021011 is 110120221122102.

201221122021011 is a `hidden beast` number, since 2 + 0 + 1 + 221 + 1 + 220 + 210 + 11 = 666.

It is not a de Polignac number, because 201221122021011 - 2²³ = 201221113632403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221122021081) 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, 9308025181 + ... + 9308046798.

Almost surely, 2^{201221122021011} is an apocalyptic number.

201221122021011 is a deficient number, since it is larger than the sum of its proper divisors (89673618738469).

201221122021011 is a wasteful number, since it uses less digits than its factorization.

201221122021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18616073186 (or 18616073183 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201221122021011 its reverse (110120221122102), we get a palindrome (311341343143113).

The spelling of 201221122021011 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred twenty-two million, twenty-one thousand, eleven".