101121201012021 has 4 divisors (see below), whose sum is σ = 134828268016032. Its totient is φ = 67414134008012.

The previous prime is 101121201012019. The next prime is 101121201012047. The reversal of 101121201012021 is 120210102121101.

It is a happy number.

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 101121201012021 - 2¹ = 101121201012019 is a prime.

It is a super-2 number, since 2×101121201012021² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121201011021) 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, 16853533502001 + ... + 16853533502006.

It is an arithmetic number, because the mean of its divisors is an integer number (33707067004008).

Almost surely, 2^{101121201012021} is an apocalyptic number.

It is an amenable number.

101121201012021 is a deficient number, since it is larger than the sum of its proper divisors (33707067004011).

101121201012021 is an equidigital number, since it uses as much as digits as its factorization.

101121201012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33707067004010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101121201012021 its reverse (120210102121101), we get a palindrome (221331303133122).

The spelling of 101121201012021 in words is "one hundred one trillion, one hundred twenty-one billion, two hundred one million, twelve thousand, twenty-one".