1020001221010 has 32 divisors (see below), whose sum is σ = 1935696931200. Its totient is φ = 385914170880.

The previous prime is 1020001220999. The next prime is 1020001221023. The reversal of 1020001221010 is 101221000201.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4134015 + ... + 4373794.

It is an arithmetic number, because the mean of its divisors is an integer number (60490529100).

Almost surely, 2^{1020001221010} is an apocalyptic number.

1020001221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020001221010 is a deficient number, since it is larger than the sum of its proper divisors (915695710190).

1020001221010 is a wasteful number, since it uses less digits than its factorization.

1020001221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508466.

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

Adding to 1020001221010 its reverse (101221000201), we get a palindrome (1121222221211).

The spelling of 1020001221010 in words is "one trillion, twenty billion, one million, two hundred twenty-one thousand, ten".