221150610121 has 16 divisors (see below), whose sum is σ = 253844941824. Its totient is φ = 188733237264.

The previous prime is 221150610061. The next prime is 221150610139. The reversal of 221150610121 is 121016051122.

It is a cyclic number.

It is not a de Polignac number, because 221150610121 - 2⁹ = 221150609609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221150610092 and 221150610101.

It is not an unprimeable number, because it can be changed into a prime (221150650121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592356 + ... + 1725658.

It is an arithmetic number, because the mean of its divisors is an integer number (15865308864).

Almost surely, 2^221150610121 is an apocalyptic number.

It is an amenable number.

221150610121 is a deficient number, since it is larger than the sum of its proper divisors (32694331703).

221150610121 is a wasteful number, since it uses less digits than its factorization.

221150610121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134340.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 221150610121 its reverse (121016051122), we get a palindrome (342166661243).

The spelling of 221150610121 in words is "two hundred twenty-one billion, one hundred fifty million, six hundred ten thousand, one hundred twenty-one".