21121101022011 has 8 divisors (see below), whose sum is σ = 28162727069520. Its totient is φ = 14080104494592.

The previous prime is 21121101022003. The next prime is 21121101022013. The reversal of 21121101022011 is 11022010112112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21121101022011 - 2³ = 21121101022003 is a prime.

It is a super-2 number, since 2×21121101022011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121101022013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157301730 + ... + 157435943.

It is an arithmetic number, because the mean of its divisors is an integer number (3520340883690).

Almost surely, 2^{21121101022011} is an apocalyptic number.

21121101022011 is a deficient number, since it is larger than the sum of its proper divisors (7041626047509).

21121101022011 is a wasteful number, since it uses less digits than its factorization.

21121101022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314760045.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21121101022011 its reverse (11022010112112), we get a palindrome (32143111134123).

The spelling of 21121101022011 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, twenty-two thousand, eleven".