1220212120020 has 96 divisors (see below), whose sum is σ = 3500357414400. Its totient is φ = 317414384640.

The previous prime is 1220212120009. The next prime is 1220212120031. The reversal of 1220212120020 is 200212120221.

It is an interprime number because it is at equal distance from previous prime (1220212120009) and next prime (1220212120031).

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

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, 23622181 + ... + 23673779.

It is an arithmetic number, because the mean of its divisors is an integer number (36462056400).

Almost surely, 2^{1220212120020} is an apocalyptic number.

1220212120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220212120020 is an abundant number, since it is smaller than the sum of its proper divisors (2280145294380).

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

1220212120020 is a wasteful number, since it uses less digits than its factorization.

1220212120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61265 (or 61263 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220212120020 its reverse (200212120221), we get a palindrome (1420424240241).

The spelling of 1220212120020 in words is "one trillion, two hundred twenty billion, two hundred twelve million, one hundred twenty thousand, twenty".