22101211001220 has 192 divisors, whose sum is σ = 70805000689920. Its totient is φ = 5110736504832.

The previous prime is 22101211001203. The next prime is 22101211001251. The reversal of 22101211001220 is 2210011210122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22101211001220.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12366642 + ... + 14040521.

It is an arithmetic number, because the mean of its divisors is an integer number (368776045260).

Almost surely, 2^{22101211001220} is an apocalyptic number.

22101211001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101211001220 is an abundant number, since it is smaller than the sum of its proper divisors (48703789688700).

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

22101211001220 is a wasteful number, since it uses less digits than its factorization.

22101211001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26407254 (or 26407252 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22101211001220 its reverse (2210011210122), we get a palindrome (24311222211342).

The spelling of 22101211001220 in words is "twenty-two trillion, one hundred one billion, two hundred eleven million, one thousand, two hundred twenty".