1012211111020 has 96 divisors (see below), whose sum is σ = 2371340095488. Its totient is φ = 360960433152.

The previous prime is 1012211111011. The next prime is 1012211111047. The reversal of 1012211111020 is 201111122101.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177117 + ... + 1433803.

It is an arithmetic number, because the mean of its divisors is an integer number (24701459328).

Almost surely, 2^{1012211111020} is an apocalyptic number.

1012211111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012211111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185670047744).

1012211111020 is an abundant number, since it is smaller than the sum of its proper divisors (1359128984468).

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

1012211111020 is a wasteful number, since it uses less digits than its factorization.

1012211111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256839 (or 1256837 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1012211111020 its reverse (201111122101), we get a palindrome (1213322233121).

The spelling of 1012211111020 in words is "one trillion, twelve billion, two hundred eleven million, one hundred eleven thousand, twenty".