22111212001220 has 48 divisors (see below), whose sum is σ = 46457667039168. Its totient is φ = 8839890906240.

The previous prime is 22111212001217. The next prime is 22111212001223. The reversal of 22111212001220 is 2210021211122.

It is an interprime number because it is at equal distance from previous prime (22111212001217) and next prime (22111212001223).

It is not an unprimeable number, because it can be changed into a prime (22111212001223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865701650 + ... + 865727190.

It is an arithmetic number, because the mean of its divisors is an integer number (967868063316).

Almost surely, 2^{22111212001220} is an apocalyptic number.

22111212001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111212001220 is an abundant number, since it is smaller than the sum of its proper divisors (24346455037948).

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

22111212001220 is a wasteful number, since it uses less digits than its factorization.

22111212001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46340 (or 46338 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22111212001220 its reverse (2210021211122), we get a palindrome (24321233212342).

The spelling of 22111212001220 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, one thousand, two hundred twenty".