1022212111220 has 12 divisors (see below), whose sum is σ = 2146645433604. Its totient is φ = 408884844480.

The previous prime is 1022212111183. The next prime is 1022212111243. The reversal of 1022212111220 is 221112122201.

It can be written as a sum of positive squares in 2 ways, for example, as 226358995984 + 795853115236 = 475772^2 + 892106^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25555302761 + ... + 25555302800.

It is an arithmetic number, because the mean of its divisors is an integer number (178887119467).

Almost surely, 2^{1022212111220} is an apocalyptic number.

1022212111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022212111220 is an abundant number, since it is smaller than the sum of its proper divisors (1124433322384).

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

1022212111220 is a wasteful number, since it uses less digits than its factorization.

1022212111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51110605570 (or 51110605568 counting only the distinct ones).

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

Adding to 1022212111220 its reverse (221112122201), we get a palindrome (1243324233421).

The spelling of 1022212111220 in words is "one trillion, twenty-two billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty".