1221022022210 has 16 divisors (see below), whose sum is σ = 2203638696000. Its totient is φ = 487120129776.

The previous prime is 1221022022201. The next prime is 1221022022279. The reversal of 1221022022210 is 122202201221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161080910 + ... + 161088489.

It is an arithmetic number, because the mean of its divisors is an integer number (137727418500).

Almost surely, 2^{1221022022210} is an apocalyptic number.

1221022022210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221022022210 is a deficient number, since it is larger than the sum of its proper divisors (982616673790).

1221022022210 is a wasteful number, since it uses less digits than its factorization.

1221022022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322169785.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1221022022210 its reverse (122202201221), we get a palindrome (1343224223431).

The spelling of 1221022022210 in words is "one trillion, two hundred twenty-one billion, twenty-two million, twenty-two thousand, two hundred ten".