1201011320020 has 36 divisors (see below), whose sum is σ = 2545915799700. Its totient is φ = 475914675328.

The previous prime is 1201011320009. The next prime is 1201011320077. The reversal of 1201011320020 is 200231101021.

It can be written as a sum of positive squares in 2 ways, for example, as 266208530116 + 934802789904 = 515954^2 + 966852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2393545 + ... + 2851504.

It is an arithmetic number, because the mean of its divisors is an integer number (70719883325).

Almost surely, 2^{1201011320020} is an apocalyptic number.

1201011320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201011320020 is an abundant number, since it is smaller than the sum of its proper divisors (1344904479680).

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

1201011320020 is a wasteful number, since it uses less digits than its factorization.

1201011320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245272 (or 5245163 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1201011320020 its reverse (200231101021), we get a palindrome (1401242421041).

The spelling of 1201011320020 in words is "one trillion, two hundred one billion, eleven million, three hundred twenty thousand, twenty".