20000000222421 has 4 divisors (see below), whose sum is σ = 26666666963232. Its totient is φ = 13333333481612.

The previous prime is 20000000222417. The next prime is 20000000222429. The reversal of 20000000222421 is 12422200000002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20000000222421 - 2² = 20000000222417 is a prime.

It is a super-2 number, since 2×20000000222421² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20000000222421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000000222429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333333370401 + ... + 3333333370406.

It is an arithmetic number, because the mean of its divisors is an integer number (6666666740808).

Almost surely, 2^{20000000222421} is an apocalyptic number.

It is an amenable number.

20000000222421 is a deficient number, since it is larger than the sum of its proper divisors (6666666740811).

20000000222421 is an equidigital number, since it uses as much as digits as its factorization.

20000000222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666666740810.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20000000222421 its reverse (12422200000002), we get a palindrome (32422200222423).

The spelling of 20000000222421 in words is "twenty trillion, two hundred twenty-two thousand, four hundred twenty-one".