1210011111021 has 16 divisors (see below), whose sum is σ = 1620545670144. Its totient is φ = 803075709744.

The previous prime is 1210011111019. The next prime is 1210011111031. The reversal of 1210011111021 is 1201111100121.

It is not a de Polignac number, because 1210011111021 - 2¹ = 1210011111019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1210011110988 and 1210011111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210011111031) 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, 16008700 + ... + 16084106.

It is an arithmetic number, because the mean of its divisors is an integer number (101284104384).

Almost surely, 2^{1210011111021} is an apocalyptic number.

It is an amenable number.

1210011111021 is a deficient number, since it is larger than the sum of its proper divisors (410534559123).

1210011111021 is a wasteful number, since it uses less digits than its factorization.

1210011111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99200.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1210011111021 its reverse (1201111100121), we get a palindrome (2411122211142).

The spelling of 1210011111021 in words is "one trillion, two hundred ten billion, eleven million, one hundred eleven thousand, twenty-one".