21101111010222 has 16 divisors (see below), whose sum is σ = 42204080684880. Its totient is φ = 7033393892672.

The previous prime is 21101111010167. The next prime is 21101111010277. The reversal of 21101111010222 is 22201011110112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21101111010167) and next prime (21101111010277).

It is a super-2 number, since 2×21101111010222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77296743 + ... + 77569250.

It is an arithmetic number, because the mean of its divisors is an integer number (2637755042805).

Almost surely, 2^{21101111010222} is an apocalyptic number.

21101111010222 is an abundant number, since it is smaller than the sum of its proper divisors (21102969674658).

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

21101111010222 is a wasteful number, since it uses less digits than its factorization.

21101111010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154888707.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21101111010222 its reverse (22201011110112), we get a palindrome (43302122120334).

The spelling of 21101111010222 in words is "twenty-one trillion, one hundred one billion, one hundred eleven million, ten thousand, two hundred twenty-two".