20210012011221 has 8 divisors (see below), whose sum is σ = 26947044733440. Its totient is φ = 13473160314912.

The previous prime is 20210012011193. The next prime is 20210012011249. The reversal of 20210012011221 is 12211021001202.

It is an interprime number because it is at equal distance from previous prime (20210012011193) and next prime (20210012011249).

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

It is not a de Polignac number, because 20210012011221 - 2⁶ = 20210012011157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20210012011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210012011271) 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, 44995765 + ... + 45442698.

It is an arithmetic number, because the mean of its divisors is an integer number (3368380591680).

Almost surely, 2^{20210012011221} is an apocalyptic number.

It is an amenable number.

20210012011221 is a deficient number, since it is larger than the sum of its proper divisors (6737032722219).

20210012011221 is an equidigital number, since it uses as much as digits as its factorization.

20210012011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90512955.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20210012011221 its reverse (12211021001202), we get a palindrome (32421033012423).

The spelling of 20210012011221 in words is "twenty trillion, two hundred ten billion, twelve million, eleven thousand, two hundred twenty-one".