222001001011021 has 4 divisors (see below), whose sum is σ = 235059883423452. Its totient is φ = 208942118598592.

The previous prime is 222001001010979. The next prime is 222001001011039. The reversal of 222001001011021 is 120110100100222.

222001001011021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63914108836900 + 158086892174121 = 7994630^2 + 12573261^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001001011021 - 2¹¹ = 222001001008973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222001001010992 and 222001001011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001001011051) 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, 6529441206190 + ... + 6529441206223.

It is an arithmetic number, because the mean of its divisors is an integer number (58764970855863).

Almost surely, 2^{222001001011021} is an apocalyptic number.

It is an amenable number.

222001001011021 is a deficient number, since it is larger than the sum of its proper divisors (13058882412431).

222001001011021 is a wasteful number, since it uses less digits than its factorization.

222001001011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13058882412430.

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

Adding to 222001001011021 its reverse (120110100100222), we get a palindrome (342111101111243).

The spelling of 222001001011021 in words is "two hundred twenty-two trillion, one billion, one million, eleven thousand, twenty-one".