20120001202221 has 8 divisors (see below), whose sum is σ = 26826698484480. Its totient is φ = 13413319027392.

The previous prime is 20120001202219. The next prime is 20120001202253. The reversal of 20120001202221 is 12220210002102.

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

It is not a de Polignac number, because 20120001202221 - 2¹ = 20120001202219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20120001202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120001202201) 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, 179980 + ... + 6346053.

It is an arithmetic number, because the mean of its divisors is an integer number (3353337310560).

Almost surely, 2^{20120001202221} is an apocalyptic number.

It is an amenable number.

20120001202221 is a deficient number, since it is larger than the sum of its proper divisors (6706697282259).

20120001202221 is a wasteful number, since it uses less digits than its factorization.

20120001202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553715.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20120001202221 its reverse (12220210002102), we get a palindrome (32340211204323).

The spelling of 20120001202221 in words is "twenty trillion, one hundred twenty billion, one million, two hundred two thousand, two hundred twenty-one".