1201221212110 has 32 divisors (see below), whose sum is σ = 2208606704640. Its totient is φ = 470179223712.

The previous prime is 1201221212089. The next prime is 1201221212141. The reversal of 1201221212110 is 112121221021.

It is a super-2 number, since 2×1201221212110² (a number of 25 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, 2366481 + ... + 2828899.

It is an arithmetic number, because the mean of its divisors is an integer number (69018959520).

Almost surely, 2^{1201221212110} is an apocalyptic number.

1201221212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201221212110 is a deficient number, since it is larger than the sum of its proper divisors (1007385492530).

1201221212110 is a wasteful number, since it uses less digits than its factorization.

1201221212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468000.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1201221212110 its reverse (112121221021), we get a palindrome (1313342433131).

The spelling of 1201221212110 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred ten".