21010001011212 has 12 divisors (see below), whose sum is σ = 49023335692856. Its totient is φ = 7003333670400.

The previous prime is 21010001011211. The next prime is 21010001011213. The reversal of 21010001011212 is 21211010001012.

It is an interprime number because it is at equal distance from previous prime (21010001011211) and next prime (21010001011213).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21010001011212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1750833417601 = 21010001011212 / (2 + 1 + 0 + 1 + 0 + 0 + 0 + 1 + 0 + 1 + 1 + 2 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (21010001011211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875416708789 + ... + 875416708812.

Almost surely, 2^{21010001011212} is an apocalyptic number.

It is an amenable number.

21010001011212 is an abundant number, since it is smaller than the sum of its proper divisors (28013334681644).

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

21010001011212 is a wasteful number, since it uses less digits than its factorization.

21010001011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750833417608 (or 1750833417606 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21010001011212 its reverse (21211010001012), we get a palindrome (42221011012224).

The spelling of 21010001011212 in words is "twenty-one trillion, ten billion, one million, eleven thousand, two hundred twelve".