1001012110021 has 32 divisors (see below), whose sum is σ = 1251997203456. Its totient is φ = 777522240000.

The previous prime is 1001012110003. The next prime is 1001012110057. The reversal of 1001012110021 is 1200112101001.

It is not a de Polignac number, because 1001012110021 - 2⁵ = 1001012109989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001012110421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110105686 + ... + 110114776.

It is an arithmetic number, because the mean of its divisors is an integer number (39124912608).

Almost surely, 2^{1001012110021} is an apocalyptic number.

1001012110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001012110021 is a deficient number, since it is larger than the sum of its proper divisors (250985093435).

1001012110021 is a wasteful number, since it uses less digits than its factorization.

1001012110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13513.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1001012110021 its reverse (1200112101001), we get a palindrome (2201124211022).

It can be divided in two parts, 100101 and 2110021, that added together give a palindrome (2210122).

The spelling of 1001012110021 in words is "one trillion, one billion, twelve million, one hundred ten thousand, twenty-one".