1210001221010 has 64 divisors (see below), whose sum is σ = 2364147302400. Its totient is φ = 444413552832.

The previous prime is 1210001220983. The next prime is 1210001221019. The reversal of 1210001221010 is 101221000121.

It is a junction number, because it is equal to n+sod(n) for n = 1210001220982 and 1210001221000.

It is not an unprimeable number, because it can be changed into a prime (1210001221019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262031 + ... + 1577549.

It is an arithmetic number, because the mean of its divisors is an integer number (36939801600).

Almost surely, 2^{1210001221010} is an apocalyptic number.

1210001221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1210001221010 is a deficient number, since it is larger than the sum of its proper divisors (1154146081390).

1210001221010 is a wasteful number, since it uses less digits than its factorization.

1210001221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315695.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1210001221010 its reverse (101221000121), we get a palindrome (1311222221131).

The spelling of 1210001221010 in words is "one trillion, two hundred ten billion, one million, two hundred twenty-one thousand, ten".