22121221230 has 32 divisors (see below), whose sum is σ = 58989924000. Its totient is φ = 5898992256.

The previous prime is 22121221223. The next prime is 22121221277. The reversal of 22121221230 is 3212212122.

22121221230 is a `hidden beast` number, since 2 + 212 + 1 + 221 + 230 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40964955 + ... + 40965494.

It is an arithmetic number, because the mean of its divisors is an integer number (1843435125).

Almost surely, 2^22121221230 is an apocalyptic number.

22121221230 is an abundant number, since it is smaller than the sum of its proper divisors (36868702770).

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

22121221230 is a wasteful number, since it uses less digits than its factorization.

22121221230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81930465 (or 81930459 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22121221230 its reverse (3212212122), we get a palindrome (25333433352).

The spelling of 22121221230 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred thirty".