1000011212020 has 24 divisors (see below), whose sum is σ = 2100188160000. Its totient is φ = 399973129632.

The previous prime is 1000011211973. The next prime is 1000011212029. The reversal of 1000011212020 is 202121100001.

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 = 1000011211988 and 1000011212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000011212029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697320 + ... + 2209279.

It is an arithmetic number, because the mean of its divisors is an integer number (87507840000).

Almost surely, 2^{1000011212020} is an apocalyptic number.

1000011212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000011212020 is an abundant number, since it is smaller than the sum of its proper divisors (1100176947980).

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

1000011212020 is a wasteful number, since it uses less digits than its factorization.

1000011212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919407 (or 3919405 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1000011212020 its reverse (202121100001), we get a palindrome (1202132312021).

The spelling of 1000011212020 in words is "one trillion, eleven million, two hundred twelve thousand, twenty".