1022112212220 has 96 divisors (see below), whose sum is σ = 3468986922240. Its totient is φ = 247784777280.

The previous prime is 1022112212203. The next prime is 1022112212263. The reversal of 1022112212220 is 222122112201.

It is a happy number.

1022112212220 is a `hidden beast` number, since 1 + 0 + 221 + 1 + 221 + 2 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1022112212193 and 1022112212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86030442 + ... + 86042321.

It is an arithmetic number, because the mean of its divisors is an integer number (36135280440).

Almost surely, 2^{1022112212220} is an apocalyptic number.

1022112212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022112212220 is an abundant number, since it is smaller than the sum of its proper divisors (2446874710020).

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

1022112212220 is a wasteful number, since it uses less digits than its factorization.

1022112212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172072792 (or 172072784 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1022112212220 its reverse (222122112201), we get a palindrome (1244234324421).

The spelling of 1022112212220 in words is "one trillion, twenty-two billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty".