22001221202012 has 24 divisors (see below), whose sum is σ = 41575003104096. Its totient is φ = 10127186157888.

The previous prime is 22001221201937. The next prime is 22001221202021. The reversal of 22001221202012 is 21020212210022.

It is a happy number.

It is a super-2 number, since 2×22001221202012² (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, 567139328 + ... + 567178119.

It is an arithmetic number, because the mean of its divisors is an integer number (1732291796004).

Almost surely, 2^{22001221202012} is an apocalyptic number.

It is an amenable number.

22001221202012 is a deficient number, since it is larger than the sum of its proper divisors (19573781902084).

22001221202012 is a wasteful number, since it uses less digits than its factorization.

22001221202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134317837 (or 1134317835 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22001221202012 its reverse (21020212210022), we get a palindrome (43021433412034).

The spelling of 22001221202012 in words is "twenty-two trillion, one billion, two hundred twenty-one million, two hundred two thousand, twelve".