1212020110020 has 48 divisors (see below), whose sum is σ = 3394361634048. Its totient is φ = 323138188800.

The previous prime is 1212020109961. The next prime is 1212020110031. The reversal of 1212020110020 is 200110202121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1212020109978 and 1212020110005.

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, 1807756 + ... + 2385795.

It is an arithmetic number, because the mean of its divisors is an integer number (70715867376).

Almost surely, 2^{1212020110020} is an apocalyptic number.

1212020110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212020110020 is an abundant number, since it is smaller than the sum of its proper divisors (2182341524028).

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

1212020110020 is a wasteful number, since it uses less digits than its factorization.

1212020110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198380 (or 4198378 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1212020110020 its reverse (200110202121), we get a palindrome (1412130312141).

The spelling of 1212020110020 in words is "one trillion, two hundred twelve billion, twenty million, one hundred ten thousand, twenty".