10221111216 has 30 divisors (see below), whose sum is σ = 28604915820. Its totient is φ = 3407037024.

The previous prime is 10221111203. The next prime is 10221111227. The reversal of 10221111216 is 61211112201.

It is a super-2 number, since 2×10221111216² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35489826 + ... + 35490113.

It is an arithmetic number, because the mean of its divisors is an integer number (953497194).

Almost surely, 2^10221111216 is an apocalyptic number.

10221111216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10221111216 is an abundant number, since it is smaller than the sum of its proper divisors (18383804604).

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

10221111216 is a wasteful number, since it uses less digits than its factorization.

10221111216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70979953 (or 70979944 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 10221111216 its reverse (61211112201), we get a palindrome (71432223417).

The spelling of 10221111216 in words is "ten billion, two hundred twenty-one million, one hundred eleven thousand, two hundred sixteen".