20212010001221 has 8 divisors (see below), whose sum is σ = 20518593180480. Its totient is φ = 19905571274688.

The previous prime is 20212010001179. The next prime is 20212010001263. The reversal of 20212010001221 is 12210001021202.

It is an interprime number because it is at equal distance from previous prime (20212010001179) and next prime (20212010001263).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20212010001221 - 2²² = 20212005806917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212010001196 and 20212010001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212010009221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35831201 + ... + 36390918.

It is an arithmetic number, because the mean of its divisors is an integer number (2564824147560).

Almost surely, 2^{20212010001221} is an apocalyptic number.

It is an amenable number.

20212010001221 is a deficient number, since it is larger than the sum of its proper divisors (306583179259).

20212010001221 is an equidigital number, since it uses as much as digits as its factorization.

20212010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72226363.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20212010001221 its reverse (12210001021202), we get a palindrome (32422011022423).

The spelling of 20212010001221 in words is "twenty trillion, two hundred twelve billion, ten million, one thousand, two hundred twenty-one".