221221101001010 has 32 divisors (see below), whose sum is σ = 434531418778944. Its totient is φ = 80419292200000.

The previous prime is 221221101000967. The next prime is 221221101001037. The reversal of 221221101001010 is 10100101122122.

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, 308947361 + ... + 309662580.

It is an arithmetic number, because the mean of its divisors is an integer number (13579106836842).

Almost surely, 2^{221221101001010} is an apocalyptic number.

221221101001010 is a deficient number, since it is larger than the sum of its proper divisors (213310317777934).

221221101001010 is a wasteful number, since it uses less digits than its factorization.

221221101001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618613210.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221221101001010 its reverse (10100101122122), we get a palindrome (231321202123132).

The spelling of 221221101001010 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred one million, one thousand, ten".