21122102312 has 16 divisors (see below), whose sum is σ = 39629631840. Its totient is φ = 10554200496.

The previous prime is 21122102311. The next prime is 21122102317. The reversal of 21122102312 is 21320122112.

It is a super-3 number, since 3×21122102312³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21122102311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843218 + ... + 867905.

It is an arithmetic number, because the mean of its divisors is an integer number (2476851990).

Almost surely, 2^21122102312 is an apocalyptic number.

It is an amenable number.

21122102312 is a deficient number, since it is larger than the sum of its proper divisors (18507529528).

21122102312 is a wasteful number, since it uses less digits than its factorization.

21122102312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712672 (or 1712668 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21122102312 its reverse (21320122112), we get a palindrome (42442224424).

The spelling of 21122102312 in words is "twenty-one billion, one hundred twenty-two million, one hundred two thousand, three hundred twelve".