21211402111 has 16 divisors (see below), whose sum is σ = 22489236000. Its totient is φ = 19970496000.

The previous prime is 21211402109. The next prime is 21211402123. The reversal of 21211402111 is 11120411212.

It is a cyclic number.

It is not a de Polignac number, because 21211402111 - 2¹ = 21211402109 is a prime.

It is a super-3 number, since 3×21211402111³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211402181) 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, 3622336 + ... + 3628186.

It is an arithmetic number, because the mean of its divisors is an integer number (1405577250).

Almost surely, 2^21211402111 is an apocalyptic number.

21211402111 is a deficient number, since it is larger than the sum of its proper divisors (1277833889).

21211402111 is a wasteful number, since it uses less digits than its factorization.

21211402111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8970.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211402111 its reverse (11120411212), we get a palindrome (32331813323).

The spelling of 21211402111 in words is "twenty-one billion, two hundred eleven million, four hundred two thousand, one hundred eleven".