210021120222101 has 4 divisors (see below), whose sum is σ = 211109312555052. Its totient is φ = 208932927889152.

The previous prime is 210021120222083. The next prime is 210021120222107. The reversal of 210021120222101 is 101222021120012.

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 73567159036900 + 136453961185201 = 8577130^2 + 11681351^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021120222101 - 2⁶ = 210021120222037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210021120222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021120222107) 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, 544096166186 + ... + 544096166571.

It is an arithmetic number, because the mean of its divisors is an integer number (52777328138763).

Almost surely, 2^{210021120222101} is an apocalyptic number.

It is an amenable number.

210021120222101 is a deficient number, since it is larger than the sum of its proper divisors (1088192332951).

210021120222101 is a wasteful number, since it uses less digits than its factorization.

210021120222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088192332950.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210021120222101 its reverse (101222021120012), we get a palindrome (311243141342113).

The spelling of 210021120222101 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, one hundred one".