101002011221 has 4 divisors (see below), whose sum is σ = 101003117952. Its totient is φ = 101000904492.

The previous prime is 101002011199. The next prime is 101002011241. The reversal of 101002011221 is 122110200101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101002011221 - 2¹⁴ = 101001994837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002011241) 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, 402821 + ... + 603546.

It is an arithmetic number, because the mean of its divisors is an integer number (25250779488).

Almost surely, 2^101002011221 is an apocalyptic number.

It is an amenable number.

101002011221 is a deficient number, since it is larger than the sum of its proper divisors (1106731).

101002011221 is a wasteful number, since it uses less digits than its factorization.

101002011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106730.

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

Adding to 101002011221 its reverse (122110200101), we get a palindrome (223112211322).

The spelling of 101002011221 in words is "one hundred one billion, two million, eleven thousand, two hundred twenty-one".