22121148 has 72 divisors (see below), whose sum is σ = 63603792. Its totient is φ = 5945856.

The previous prime is 22121137. The next prime is 22121159. The reversal of 22121148 is 84112122.

It is an interprime number because it is at equal distance from previous prime (22121137) and next prime (22121159).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8890 + ... + 11102.

It is an arithmetic number, because the mean of its divisors is an integer number (883386).

Almost surely, 2^22121148 is an apocalyptic number.

22121148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31801896).

22121148 is an abundant number, since it is smaller than the sum of its proper divisors (41482644).

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

22121148 is a wasteful number, since it uses less digits than its factorization.

22121148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2242 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

The square root of 22121148 is about 4703.3124497528. The cubic root of 22121148 is about 280.7173273881.

It can be divided in two parts, 2212114 and 8, that added together give a palindrome (2212122).

The spelling of 22121148 in words is "twenty-two million, one hundred twenty-one thousand, one hundred forty-eight".