20001151215222 has 32 divisors (see below), whose sum is σ = 40097173129344. Its totient is φ = 6651257131200.

The previous prime is 20001151215217. The next prime is 20001151215223. The reversal of 20001151215222 is 22251215110002.

It is a junction number, because it is equal to n+sod(n) for n = 20001151215192 and 20001151215201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001151215223) 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, 2011197 + ... + 6636807.

It is an arithmetic number, because the mean of its divisors is an integer number (1253036660292).

Almost surely, 2^{20001151215222} is an apocalyptic number.

20001151215222 is an abundant number, since it is smaller than the sum of its proper divisors (20096021914122).

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

20001151215222 is a wasteful number, since it uses less digits than its factorization.

20001151215222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627324.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 20001151215222 its reverse (22251215110002), we get a palindrome (42252366325224).

The spelling of 20001151215222 in words is "twenty trillion, one billion, one hundred fifty-one million, two hundred fifteen thousand, two hundred twenty-two".