101121121022021 has 4 divisors (see below), whose sum is σ = 101679801248844. Its totient is φ = 100562440795200.

The previous prime is 101121121022017. The next prime is 101121121022107. The reversal of 101121121022021 is 120220121121101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9846504271396 + 91274616750625 = 3137914^2 + 9553775^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121121022021 - 2² = 101121121022017 is a prime.

It is a super-2 number, since 2×101121121022021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121121022011) 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, 279340113140 + ... + 279340113501.

It is an arithmetic number, because the mean of its divisors is an integer number (25419950312211).

Almost surely, 2^{101121121022021} is an apocalyptic number.

It is an amenable number.

101121121022021 is a deficient number, since it is larger than the sum of its proper divisors (558680226823).

101121121022021 is an equidigital number, since it uses as much as digits as its factorization.

101121121022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558680226822.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 101121121022021 its reverse (120220121121101), we get a palindrome (221341242143122).

The spelling of 101121121022021 in words is "one hundred one trillion, one hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, twenty-one".