1000012021101 has 12 divisors (see below), whose sum is σ = 1497960394112. Its totient is φ = 666674680572.

The previous prime is 1000012021069. The next prime is 1000012021133. The reversal of 1000012021101 is 1011202100001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1000012021069) and next prime (1000012021133).

It is not a de Polignac number, because 1000012021101 - 2⁵ = 1000012021069 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000012021201) 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, 2057637661 + ... + 2057638146.

Almost surely, 2^{1000012021101} is an apocalyptic number.

It is an amenable number.

1000012021101 is a deficient number, since it is larger than the sum of its proper divisors (497948373011).

1000012021101 is an frugal number, since it uses more digits than its factorization.

1000012021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115275822 (or 4115275810 counting only the distinct ones).

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

Adding to 1000012021101 its reverse (1011202100001), we get a palindrome (2011214121102).

The spelling of 1000012021101 in words is "one trillion, twelve million, twenty-one thousand, one hundred one".