21211402110 has 32 divisors (see below), whose sum is σ = 51770206080. Its totient is φ = 5560502688.

The previous prime is 21211402109. The next prime is 21211402123. The reversal of 21211402110 is 1120411212.

21211402110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21211402110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21211402110.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5990152 + ... + 5993691.

It is an arithmetic number, because the mean of its divisors is an integer number (1617818940).

Almost surely, 2^21211402110 is an apocalyptic number.

21211402110 is an abundant number, since it is smaller than the sum of its proper divisors (30558803970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211402110 is a wasteful number, since it uses less digits than its factorization.

21211402110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11983912.

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

Adding to 21211402110 its reverse (1120411212), we get a palindrome (22331813322).

The spelling of 21211402110 in words is "twenty-one billion, two hundred eleven million, four hundred two thousand, one hundred ten".