1210012101221 has 32 divisors (see below), whose sum is σ = 1515331584000. Its totient is φ = 938653188480.

The previous prime is 1210012101163. The next prime is 1210012101229. The reversal of 1210012101221 is 1221012100121.

It is not a de Polignac number, because 1210012101221 - 2²⁶ = 1209944992357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210012101196 and 1210012101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210012101229) 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, 85548476 + ... + 85562618.

It is an arithmetic number, because the mean of its divisors is an integer number (47354112000).

Almost surely, 2^{1210012101221} is an apocalyptic number.

1210012101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210012101221 is a deficient number, since it is larger than the sum of its proper divisors (305319482779).

1210012101221 is a wasteful number, since it uses less digits than its factorization.

1210012101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19049.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1210012101221 its reverse (1221012100121), we get a palindrome (2431024201342).

It can be divided in two parts, 121001 and 2101221, that added together give a palindrome (2222222).

The spelling of 1210012101221 in words is "one trillion, two hundred ten billion, twelve million, one hundred one thousand, two hundred twenty-one".