1210021212111 has 32 divisors (see below), whose sum is σ = 1666022265600. Its totient is φ = 780600105216.

The previous prime is 1210021212109. The next prime is 1210021212119. The reversal of 1210021212111 is 1112121200121.

It is a happy number.

It is not a de Polignac number, because 1210021212111 - 2¹ = 1210021212109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210021212119) 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, 15534340 + ... + 15612038.

It is an arithmetic number, because the mean of its divisors is an integer number (52063195800).

Almost surely, 2^{1210021212111} is an apocalyptic number.

1210021212111 is a deficient number, since it is larger than the sum of its proper divisors (456001053489).

1210021212111 is a wasteful number, since it uses less digits than its factorization.

1210021212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78503.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1210021212111 its reverse (1112121200121), we get a palindrome (2322142412232).

The spelling of 1210021212111 in words is "one trillion, two hundred ten billion, twenty-one million, two hundred twelve thousand, one hundred eleven".