21120022012011 has 16 divisors (see below), whose sum is σ = 30395265626880. Its totient is φ = 12967330834080.

The previous prime is 21120022011997. The next prime is 21120022012091. The reversal of 21120022012011 is 11021022002112.

It is not a de Polignac number, because 21120022012011 - 2¹⁷ = 21120021880939 is a prime.

It is a super-3 number, since 3×21120022012011³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120022012091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616769925 + ... + 616804166.

It is an arithmetic number, because the mean of its divisors is an integer number (1899704101680).

Almost surely, 2^{21120022012011} is an apocalyptic number.

21120022012011 is a deficient number, since it is larger than the sum of its proper divisors (9275243614869).

21120022012011 is a wasteful number, since it uses less digits than its factorization.

21120022012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233574546.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120022012011 its reverse (11021022002112), we get a palindrome (32141044014123).

The spelling of 21120022012011 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, twelve thousand, eleven".