21012210114 has 64 divisors (see below), whose sum is σ = 48710301696. Its totient is φ = 5918500224.

The previous prime is 21012210113. The next prime is 21012210139. The reversal of 21012210114 is 41101221012.

It is a junction number, because it is equal to n+sod(n) for n = 21012210093 and 21012210102.

It is not an unprimeable number, because it can be changed into a prime (21012210113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1691494 + ... + 1703870.

It is an arithmetic number, because the mean of its divisors is an integer number (761098464).

Almost surely, 2^21012210114 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21012210114, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24355150848).

21012210114 is an abundant number, since it is smaller than the sum of its proper divisors (27698091582).

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

21012210114 is a wasteful number, since it uses less digits than its factorization.

21012210114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12959.

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

Adding to 21012210114 its reverse (41101221012), we get a palindrome (62113431126).

The spelling of 21012210114 in words is "twenty-one billion, twelve million, two hundred ten thousand, one hundred fourteen".