1210121211010 has 8 divisors (see below), whose sum is σ = 2178218179836. Its totient is φ = 484048484400.

The previous prime is 1210121211001. The next prime is 1210121211011. The reversal of 1210121211010 is 101121210121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1209188336161 + 932874849 = 1099631^2 + 30543^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1210121211011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60506060541 + ... + 60506060560.

Almost surely, 2^{1210121211010} is an apocalyptic number.

1210121211010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1210121211010 is a deficient number, since it is larger than the sum of its proper divisors (968096968826).

1210121211010 is a wasteful number, since it uses less digits than its factorization.

1210121211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121012121108.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1210121211010 its reverse (101121210121), we get a palindrome (1311242421131).

The spelling of 1210121211010 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, two hundred eleven thousand, ten".