2021101101121 has 2 divisors, whose sum is σ = 2021101101122. Its totient is φ = 2021101101120.

The previous prime is 2021101101119. The next prime is 2021101101167. The reversal of 2021101101121 is 1211011011202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1973080952896 + 48020148225 = 1404664^2 + 219135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021101101121 - 2¹ = 2021101101119 is a prime.

Together with 2021101101119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2021101101221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010550550560 + 1010550550561.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550550561).

Almost surely, 2^{2021101101121} is an apocalyptic number.

It is an amenable number.

2021101101121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021101101121 is an equidigital number, since it uses as much as digits as its factorization.

2021101101121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2021101101121 its reverse (1211011011202), we get a palindrome (3232112112323).

The spelling of 2021101101121 in words is "two trillion, twenty-one billion, one hundred one million, one hundred one thousand, one hundred twenty-one".