1021120100010 has 96 divisors (see below), whose sum is σ = 2717976381120. Its totient is φ = 265836743424.

The previous prime is 1021120100009. The next prime is 1021120100041. The reversal of 1021120100010 is 100010211201.

It is a happy number.

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 = 1021120099965 and 1021120100001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8021277 + ... + 8147583.

It is an arithmetic number, because the mean of its divisors is an integer number (28312253970).

Almost surely, 2^{1021120100010} is an apocalyptic number.

1021120100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021120100010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1358988190560).

1021120100010 is an abundant number, since it is smaller than the sum of its proper divisors (1696856281110).

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

1021120100010 is a wasteful number, since it uses less digits than its factorization.

1021120100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128452 (or 128449 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1021120100010 its reverse (100010211201), we get a palindrome (1121130311211).

The spelling of 1021120100010 in words is "one trillion, twenty-one billion, one hundred twenty million, one hundred thousand, ten".