121220210110 has 16 divisors (see below), whose sum is σ = 218203495776. Its totient is φ = 48486502368.

The previous prime is 121220210107. The next prime is 121220210123. The reversal of 121220210110 is 11012022121.

It is a super-2 number, since 2×121220210110² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 153967 + ... + 515893.

It is an arithmetic number, because the mean of its divisors is an integer number (13637718486).

Almost surely, 2^121220210110 is an apocalyptic number.

121220210110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220210110 is a deficient number, since it is larger than the sum of its proper divisors (96983285666).

121220210110 is a wasteful number, since it uses less digits than its factorization.

121220210110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395427.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121220210110 its reverse (11012022121), we get a palindrome (132232232231).

The spelling of 121220210110 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, one hundred ten".