21120212212011 has 96 divisors (see below), whose sum is σ = 33890758836480. Its totient is φ = 12567018240000.

The previous prime is 21120212212003. The next prime is 21120212212049. The reversal of 21120212212011 is 11021221202112.

21120212212011 is a `hidden beast` number, since 211 + 20 + 212 + 21 + 201 + 1 = 666.

It is not a de Polignac number, because 21120212212011 - 2³ = 21120212212003 is a prime.

It is a super-2 number, since 2×21120212212011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120212212081) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5255089360 + ... + 5255093378.

It is an arithmetic number, because the mean of its divisors is an integer number (353028737880).

Almost surely, 2^{21120212212011} is an apocalyptic number.

21120212212011 is a deficient number, since it is larger than the sum of its proper divisors (12770546624469).

21120212212011 is a wasteful number, since it uses less digits than its factorization.

21120212212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7257 (or 7254 counting only the distinct ones).

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

Adding to 21120212212011 its reverse (11021221202112), we get a palindrome (32141433414123).

The spelling of 21120212212011 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, two hundred twelve thousand, eleven".