1201110110020 has 72 divisors (see below), whose sum is σ = 2747946394368. Its totient is φ = 440474932800.

The previous prime is 1201110110009. The next prime is 1201110110021. The reversal of 1201110110020 is 200110111021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1201110109979 and 1201110110006.

It is not an unprimeable number, because it can be changed into a prime (1201110110021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2459386 + ... + 2907025.

It is an arithmetic number, because the mean of its divisors is an integer number (38165922144).

Almost surely, 2^{1201110110020} is an apocalyptic number.

1201110110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201110110020 is an abundant number, since it is smaller than the sum of its proper divisors (1546836284348).

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

1201110110020 is a wasteful number, since it uses less digits than its factorization.

1201110110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366489 (or 5366468 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1201110110020 its reverse (200110111021), we get a palindrome (1401220221041).

The spelling of 1201110110020 in words is "one trillion, two hundred one billion, one hundred ten million, one hundred ten thousand, twenty".