2211012100021 has 4 divisors (see below), whose sum is σ = 2262430986112. Its totient is φ = 2159593213932.

The previous prime is 2211012100013. The next prime is 2211012100091. The reversal of 2211012100021 is 1200012101122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2211012100021 - 2³ = 2211012100013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211012099974 and 2211012100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211012100091) 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, 25709442981 + ... + 25709443066.

It is an arithmetic number, because the mean of its divisors is an integer number (565607746528).

Almost surely, 2^{2211012100021} is an apocalyptic number.

It is an amenable number.

2211012100021 is a deficient number, since it is larger than the sum of its proper divisors (51418886091).

2211012100021 is an equidigital number, since it uses as much as digits as its factorization.

2211012100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51418886090.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2211012100021 its reverse (1200012101122), we get a palindrome (3411024201143).

The spelling of 2211012100021 in words is "two trillion, two hundred eleven billion, twelve million, one hundred thousand, twenty-one".