22122121211010 has 128 divisors (see below), whose sum is σ = 59120461128960. Its totient is φ = 5886428018688.

The previous prime is 22122121210991. The next prime is 22122121211011. The reversal of 22122121211010 is 1011212122122.

22122121211010 is a `hidden beast` number, since 221 + 221 + 2 + 1 + 211 + 0 + 10 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (22122121211011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 350706834 + ... + 350769906.

It is an arithmetic number, because the mean of its divisors is an integer number (461878602570).

Almost surely, 2^{22122121211010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22122121211010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29560230564480).

22122121211010 is an abundant number, since it is smaller than the sum of its proper divisors (36998339917950).

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

22122121211010 is a wasteful number, since it uses less digits than its factorization.

22122121211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65889 (or 65883 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22122121211010 its reverse (1011212122122), we get a palindrome (23133333333132).

The spelling of 22122121211010 in words is "twenty-two trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, ten".