22212022251 has 32 divisors (see below), whose sum is σ = 30831280128. Its totient is φ = 14214523680.

The previous prime is 22212022249. The next prime is 22212022271. The reversal of 22212022251 is 15222021222.

It is not a de Polignac number, because 22212022251 - 2¹ = 22212022249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22212022201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1746646 + ... + 1759316.

It is an arithmetic number, because the mean of its divisors is an integer number (963477504).

Almost surely, 2^22212022251 is an apocalyptic number.

22212022251 is a deficient number, since it is larger than the sum of its proper divisors (8619257877).

22212022251 is a wasteful number, since it uses less digits than its factorization.

22212022251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12951.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 22212022251 its reverse (15222021222), we get a palindrome (37434043473).

The spelling of 22212022251 in words is "twenty-two billion, two hundred twelve million, twenty-two thousand, two hundred fifty-one".