2011210122721 has 2 divisors, whose sum is σ = 2011210122722. Its totient is φ = 2011210122720.

The previous prime is 2011210122679. The next prime is 2011210122731. The reversal of 2011210122721 is 1272210121102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1889632380321 + 121577742400 = 1374639^2 + 348680^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011210122721 - 2²⁹ = 2010673251809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011210122692 and 2011210122701.

It is not a weakly prime, because it can be changed into another prime (2011210122731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005605061360 + 1005605061361.

It is an arithmetic number, because the mean of its divisors is an integer number (1005605061361).

Almost surely, 2^{2011210122721} is an apocalyptic number.

It is an amenable number.

2011210122721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011210122721 is an equidigital number, since it uses as much as digits as its factorization.

2011210122721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 2011210122721 its reverse (1272210121102), we get a palindrome (3283420243823).

The spelling of 2011210122721 in words is "two trillion, eleven billion, two hundred ten million, one hundred twenty-two thousand, seven hundred twenty-one".