2111011110021 has 8 divisors (see below), whose sum is σ = 3070561614624. Its totient is φ = 1279400672720.

The previous prime is 2111011109983. The next prime is 2111011110029. The reversal of 2111011110021 is 1200111101112.

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 2111011110021 - 2⁶ = 2111011109957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111011109979 and 2111011110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111011110029) 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, 31985016786 + ... + 31985016851.

It is an arithmetic number, because the mean of its divisors is an integer number (383820201828).

Almost surely, 2^{2111011110021} is an apocalyptic number.

It is an amenable number.

2111011110021 is a deficient number, since it is larger than the sum of its proper divisors (959550504603).

2111011110021 is a wasteful number, since it uses less digits than its factorization.

2111011110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63970033651.

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

Adding to 2111011110021 its reverse (1200111101112), we get a palindrome (3311122211133).

The spelling of 2111011110021 in words is "two trillion, one hundred eleven billion, eleven million, one hundred ten thousand, twenty-one".