1201010020020 has 72 divisors (see below), whose sum is σ = 3670873446240. Its totient is φ = 317824528320.

The previous prime is 1201010019991. The next prime is 1201010020037. The reversal of 1201010020020 is 200200101021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1201010019984 and 1201010020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25443130 + ... + 25490289.

It is an arithmetic number, because the mean of its divisors is an integer number (50984353420).

Almost surely, 2^{1201010020020} is an apocalyptic number.

1201010020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201010020020 is an abundant number, since it is smaller than the sum of its proper divisors (2469863426220).

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

1201010020020 is a wasteful number, since it uses less digits than its factorization.

1201010020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50933565 (or 50933560 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1201010020020 its reverse (200200101021), we get a palindrome (1401210121041).

The spelling of 1201010020020 in words is "one trillion, two hundred one billion, ten million, twenty thousand, twenty".