1221222210010 has 256 divisors, whose sum is σ = 2564894937600. Its totient is φ = 414554112000.

The previous prime is 1221222209953. The next prime is 1221222210053. The reversal of 1221222210010 is 100122221221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3222222001 + ... + 3222222379.

It is an arithmetic number, because the mean of its divisors is an integer number (10019120850).

Almost surely, 2^{1221222210010} is an apocalyptic number.

1221222210010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221222210010 is an abundant number, since it is smaller than the sum of its proper divisors (1343672727590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221222210010 is a wasteful number, since it uses less digits than its factorization.

1221222210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221222210010 its reverse (100122221221), we get a palindrome (1321344431231).

It can be divided in two parts, 12212 and 22210010, that added together give a palindrome (22222222).

The spelling of 1221222210010 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, ten".