101221000020011 has 4 divisors (see below), whose sum is σ = 101288797074432. Its totient is φ = 101153202965592.

The previous prime is 101221000019963. The next prime is 101221000020013. The reversal of 101221000020011 is 110020000122101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101221000020011 - 2⁶ = 101221000019947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221000019974 and 101221000020001.

It is not an unprimeable number, because it can be changed into a prime (101221000020013) 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, 33898524971 + ... + 33898527956.

It is an arithmetic number, because the mean of its divisors is an integer number (25322199268608).

Almost surely, 2^{101221000020011} is an apocalyptic number.

101221000020011 is a deficient number, since it is larger than the sum of its proper divisors (67797054421).

101221000020011 is an equidigital number, since it uses as much as digits as its factorization.

101221000020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67797054420.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101221000020011 its reverse (110020000122101), we get a palindrome (211241000142112).

The spelling of 101221000020011 in words is "one hundred one trillion, two hundred twenty-one billion, twenty thousand, eleven".