1220212202120 has 64 divisors (see below), whose sum is σ = 3033366433920. Its totient is φ = 439401217024.

The previous prime is 1220212202107. The next prime is 1220212202141. The reversal of 1220212202120 is 212022120221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 38993702 + ... + 39024981.

It is an arithmetic number, because the mean of its divisors is an integer number (47396350530).

Almost surely, 2^{1220212202120} is an apocalyptic number.

1220212202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220212202120 is an abundant number, since it is smaller than the sum of its proper divisors (1813154231800).

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

1220212202120 is a wasteful number, since it uses less digits than its factorization.

1220212202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78018734 (or 78018730 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220212202120 its reverse (212022120221), we get a palindrome (1432234322341).

The spelling of 1220212202120 in words is "one trillion, two hundred twenty billion, two hundred twelve million, two hundred two thousand, one hundred twenty".