1210021011011 has 16 divisors (see below), whose sum is σ = 1275087290400. Its totient is φ = 1145093557248.

The previous prime is 1210021010999. The next prime is 1210021011019. The reversal of 1210021011011 is 1101101200121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210021011011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210021010983 and 1210021011001.

It is not an unprimeable number, because it can be changed into a prime (1210021011019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74440961 + ... + 74457213.

It is an arithmetic number, because the mean of its divisors is an integer number (79692955650).

Almost surely, 2^{1210021011011} is an apocalyptic number.

1210021011011 is a deficient number, since it is larger than the sum of its proper divisors (65066279389).

1210021011011 is a wasteful number, since it uses less digits than its factorization.

1210021011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20278.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1210021011011 its reverse (1101101200121), we get a palindrome (2311122211132).

The spelling of 1210021011011 in words is "one trillion, two hundred ten billion, twenty-one million, eleven thousand, eleven".