20000221121222 has 16 divisors (see below), whose sum is σ = 31765578298272. Its totient is φ = 9411714326400.

The previous prime is 20000221121197. The next prime is 20000221121261. The reversal of 20000221121222 is 22212112200002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20000221121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2710154 + ... + 6880797.

It is an arithmetic number, because the mean of its divisors is an integer number (1985348643642).

Almost surely, 2^{20000221121222} is an apocalyptic number.

20000221121222 is a deficient number, since it is larger than the sum of its proper divisors (11765357177050).

20000221121222 is a wasteful number, since it uses less digits than its factorization.

20000221121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652303.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20000221121222 its reverse (22212112200002), we get a palindrome (42212333321224).

The spelling of 20000221121222 in words is "twenty trillion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-two".