20010021221201 has 16 divisors (see below), whose sum is σ = 21846789980928. Its totient is φ = 18176204323200.

The previous prime is 20010021221171. The next prime is 20010021221227. The reversal of 20010021221201 is 10212212001002.

It is a de Polignac number, because none of the positive numbers 2^k-20010021221201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20010021221231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69175811 + ... + 69464471.

It is an arithmetic number, because the mean of its divisors is an integer number (1365424373808).

Almost surely, 2^{20010021221201} is an apocalyptic number.

It is an amenable number.

20010021221201 is a deficient number, since it is larger than the sum of its proper divisors (1836768759727).

20010021221201 is a wasteful number, since it uses less digits than its factorization.

20010021221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293752.

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

Adding to 20010021221201 its reverse (10212212001002), we get a palindrome (30222233222203).

The spelling of 20010021221201 in words is "twenty trillion, ten billion, twenty-one million, two hundred twenty-one thousand, two hundred one".