1210121022011 has 4 divisors (see below), whose sum is σ = 1320132024024. Its totient is φ = 1100110020000.

The previous prime is 1210121021999. The next prime is 1210121022091. The reversal of 1210121022011 is 1102201210121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1210121022011 - 2¹⁰ = 1210121020987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1210121022091) 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, 55005500990 + ... + 55005501011.

It is an arithmetic number, because the mean of its divisors is an integer number (330033006006).

Almost surely, 2^{1210121022011} is an apocalyptic number.

1210121022011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1210121022011 is a deficient number, since it is larger than the sum of its proper divisors (110011002013).

1210121022011 is a wasteful number, since it uses less digits than its factorization.

1210121022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110011002012.

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

Adding to 1210121022011 its reverse (1102201210121), we get a palindrome (2312322232132).

The spelling of 1210121022011 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, twenty-two thousand, eleven".