1000012110021 has 12 divisors (see below), whose sum is σ = 1444483106560. Its totient is φ = 666664969320.

The previous prime is 1000012109963. The next prime is 1000012110037. The reversal of 1000012110021 is 1200112100001.

It is a happy number.

It is not a de Polignac number, because 1000012110021 - 2¹⁷ = 1000011978949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000012109985 and 1000012110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000012110091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136315 + ... + 1420776.

Almost surely, 2^{1000012110021} is an apocalyptic number.

It is an amenable number.

1000012110021 is a deficient number, since it is larger than the sum of its proper divisors (444470996539).

1000012110021 is a wasteful number, since it uses less digits than its factorization.

1000012110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628456 (or 1628453 counting only the distinct ones).

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

Adding to 1000012110021 its reverse (1200112100001), we get a palindrome (2200124210022).

The spelling of 1000012110021 in words is "one trillion, twelve million, one hundred ten thousand, twenty-one".