22121201212 has 48 divisors (see below), whose sum is σ = 44504006400. Its totient is φ = 9515180160.

The previous prime is 22121201203. The next prime is 22121201273. The reversal of 22121201212 is 21210212122.

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, 753888 + ... + 782680.

It is an arithmetic number, because the mean of its divisors is an integer number (927166800).

Almost surely, 2^22121201212 is an apocalyptic number.

22121201212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22121201212 is an abundant number, since it is smaller than the sum of its proper divisors (22382805188).

22121201212 is a wasteful number, since it uses less digits than its factorization.

22121201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29746 (or 29744 counting only the distinct ones).

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

Adding to 22121201212 its reverse (21210212122), we get a palindrome (43331413334).

The spelling of 22121201212 in words is "twenty-two billion, one hundred twenty-one million, two hundred one thousand, two hundred twelve".