21122101222011 has 12 divisors (see below), whose sum is σ = 30545054849088. Its totient is φ = 14065084006704.

The previous prime is 21122101221917. The next prime is 21122101222037. The reversal of 21122101222011 is 11022210122112.

21122101222011 is a `hidden beast` number, since 211 + 2 + 210 + 12 + 220 + 11 = 666.

It is not a de Polignac number, because 21122101222011 - 2⁷ = 21122101221883 is a prime.

It is a super-2 number, since 2×21122101222011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122101223011) 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, 1359725800 + ... + 1359741333.

It is an arithmetic number, because the mean of its divisors is an integer number (2545421237424).

Almost surely, 2^{21122101222011} is an apocalyptic number.

21122101222011 is a deficient number, since it is larger than the sum of its proper divisors (9422953627077).

21122101222011 is a wasteful number, since it uses less digits than its factorization.

21122101222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719468002 (or 2719467999 counting only the distinct ones).

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

Adding to 21122101222011 its reverse (11022210122112), we get a palindrome (32144311344123).

The spelling of 21122101222011 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred one million, two hundred twenty-two thousand, eleven".