1021012001010 has 48 divisors (see below), whose sum is σ = 2666223532440. Its totient is φ = 271080910080.

The previous prime is 1021012000999. The next prime is 1021012001017. The reversal of 1021012001010 is 101002101201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 827104759209 + 193907241801 = 909453^2 + 440349^2 .

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 = 1021012000983 and 1021012001001.

It is not an unprimeable number, because it can be changed into a prime (1021012001017) 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, 24749211 + ... + 24790430.

Almost surely, 2^{1021012001010} is an apocalyptic number.

1021012001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021012001010 is an abundant number, since it is smaller than the sum of its proper divisors (1645211531430).

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

1021012001010 is a wasteful number, since it uses less digits than its factorization.

1021012001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49539883 (or 49539880 counting only the distinct ones).

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

Adding to 1021012001010 its reverse (101002101201), we get a palindrome (1122014102211).

The spelling of 1021012001010 in words is "one trillion, twenty-one billion, twelve million, one thousand, ten".