1210120121111 has 8 divisors (see below), whose sum is σ = 1320160828800. Its totient is φ = 1100084378040.

The previous prime is 1210120121101. The next prime is 1210120121123. The reversal of 1210120121111 is 1111210210121.

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

It is a cyclic number.

It is not a de Polignac number, because 1210120121111 - 2³⁴ = 1192940251927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210120121101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722051 + ... + 1715108.

It is an arithmetic number, because the mean of its divisors is an integer number (165020103600).

Almost surely, 2^{1210120121111} is an apocalyptic number.

1210120121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1210120121111 is a deficient number, since it is larger than the sum of its proper divisors (110040707689).

1210120121111 is a wasteful number, since it uses less digits than its factorization.

1210120121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482309.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1210120121111 its reverse (1111210210121), we get a palindrome (2321330331232).

The spelling of 1210120121111 in words is "one trillion, two hundred ten billion, one hundred twenty million, one hundred twenty-one thousand, one hundred eleven".