101221011011 has 8 divisors (see below), whose sum is σ = 101899210224. Its totient is φ = 100545069600.

The previous prime is 101221011007. The next prime is 101221011013. The reversal of 101221011011 is 110110122101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101221011011 - 2² = 101221011007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221010983 and 101221011001.

It is not an unprimeable number, because it can be changed into a prime (101221011013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474440 + ... + 653861.

It is an arithmetic number, because the mean of its divisors is an integer number (12737401278).

Almost surely, 2^101221011011 is an apocalyptic number.

101221011011 is a deficient number, since it is larger than the sum of its proper divisors (678199213).

101221011011 is a wasteful number, since it uses less digits than its factorization.

101221011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128901.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 101221011011 its reverse (110110122101), we get a palindrome (211331133112).

The spelling of 101221011011 in words is "one hundred one billion, two hundred twenty-one million, eleven thousand, eleven".