22021221010012 has 48 divisors (see below), whose sum is σ = 44790147360000. Its totient is φ = 9277452313344.

The previous prime is 22021221009883. The next prime is 22021221010057. The reversal of 22021221010012 is 21001012212022.

It is a happy number.

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, 68064564 + ... + 68387332.

It is an arithmetic number, because the mean of its divisors is an integer number (933128070000).

Almost surely, 2^{22021221010012} is an apocalyptic number.

It is an amenable number.

22021221010012 is an abundant number, since it is smaller than the sum of its proper divisors (22768926349988).

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

22021221010012 is a wasteful number, since it uses less digits than its factorization.

22021221010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364138 (or 364136 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22021221010012 its reverse (21001012212022), we get a palindrome (43022233222034).

The spelling of 22021221010012 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-one million, ten thousand, twelve".