201101121616 has 20 divisors (see below), whose sum is σ = 389647144692. Its totient is φ = 100547019776.

The previous prime is 201101121577. The next prime is 201101121649. The reversal of 201101121616 is 616121101102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135206231616 + 65894890000 = 367704^2 + 256700^2 .

It is a super-2 number, since 2×201101121616² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281886 + ... + 694018.

Almost surely, 2^201101121616 is an apocalyptic number.

It is an amenable number.

201101121616 is a deficient number, since it is larger than the sum of its proper divisors (188546023076).

201101121616 is a wasteful number, since it uses less digits than its factorization.

201101121616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442638 (or 442632 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 201101121616 its reverse (616121101102), we get a palindrome (817222222718).

The spelling of 201101121616 in words is "two hundred one billion, one hundred one million, one hundred twenty-one thousand, six hundred sixteen".