221323210042 has 32 divisors (see below), whose sum is σ = 365358947328. Its totient is φ = 99718080000.

The previous prime is 221323210037. The next prime is 221323210117. The reversal of 221323210042 is 240012323122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221323209995 and 221323210022.

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, 1087042 + ... + 1274482.

It is an arithmetic number, because the mean of its divisors is an integer number (11417467104).

Almost surely, 2^221323210042 is an apocalyptic number.

221323210042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221323210042 is a deficient number, since it is larger than the sum of its proper divisors (144035737286).

221323210042 is a wasteful number, since it uses less digits than its factorization.

221323210042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187926.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221323210042 its reverse (240012323122), we get a palindrome (461335533164).

The spelling of 221323210042 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred ten thousand, forty-two".