21150205423222 has 32 divisors (see below), whose sum is σ = 32433170140224. Its totient is φ = 10341922176000.

The previous prime is 21150205423181. The next prime is 21150205423231. The reversal of 21150205423222 is 22232450205112.

It is a super-2 number, since 2×21150205423222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8695572 + ... + 10858792.

It is an arithmetic number, because the mean of its divisors is an integer number (1013536566882).

Almost surely, 2^{21150205423222} is an apocalyptic number.

21150205423222 is a deficient number, since it is larger than the sum of its proper divisors (11282964717002).

21150205423222 is a wasteful number, since it uses less digits than its factorization.

21150205423222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163864.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 21150205423222 its reverse (22232450205112), we get a palindrome (43382655628334).

The spelling of 21150205423222 in words is "twenty-one trillion, one hundred fifty billion, two hundred five million, four hundred twenty-three thousand, two hundred twenty-two".