121000022210 has 32 divisors (see below), whose sum is σ = 219069697392. Its totient is φ = 48118026240.

The previous prime is 121000022197. The next prime is 121000022261. The reversal of 121000022210 is 12220000121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 680531569 + 120319490641 = 26087^2 + 346871^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121000022191 and 121000022200.

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, 7508882 + ... + 7524978.

Almost surely, 2^121000022210 is an apocalyptic number.

121000022210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121000022210 is a deficient number, since it is larger than the sum of its proper divisors (98069675182).

121000022210 is a wasteful number, since it uses less digits than its factorization.

121000022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20438.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121000022210 its reverse (12220000121), we get a palindrome (133220022331).

The spelling of 121000022210 in words is "one hundred twenty-one billion, twenty-two thousand, two hundred ten".