22211212020221 has 24 divisors (see below), whose sum is σ = 27199000517760. Its totient is φ = 18035112412800.

The previous prime is 22211212020139. The next prime is 22211212020223. The reversal of 22211212020221 is 12202021211222.

It is not a de Polignac number, because 22211212020221 - 2¹⁸ = 22211211758077 is a prime.

It is a super-2 number, since 2×22211212020221² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22211212020193 and 22211212020202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211212020223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15349781 + ... + 16734341.

It is an arithmetic number, because the mean of its divisors is an integer number (1133291688240).

Almost surely, 2^{22211212020221} is an apocalyptic number.

It is an amenable number.

22211212020221 is a deficient number, since it is larger than the sum of its proper divisors (4987788497539).

22211212020221 is a wasteful number, since it uses less digits than its factorization.

22211212020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401825 (or 1401818 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22211212020221 its reverse (12202021211222), we get a palindrome (34413233231443).

The spelling of 22211212020221 in words is "twenty-two trillion, two hundred eleven billion, two hundred twelve million, twenty thousand, two hundred twenty-one".