101021020221 has 32 divisors (see below), whose sum is σ = 148534456320. Its totient is φ = 60561512000.

The previous prime is 101021020213. The next prime is 101021020271. The reversal of 101021020221 is 122020120101.

It is not a de Polignac number, because 101021020221 - 2³ = 101021020213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101021020197 and 101021020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101021020211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3662560 + ... + 3690038.

It is an arithmetic number, because the mean of its divisors is an integer number (4641701760).

Almost surely, 2^101021020221 is an apocalyptic number.

101021020221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101021020221 is a deficient number, since it is larger than the sum of its proper divisors (47513436099).

101021020221 is a wasteful number, since it uses less digits than its factorization.

101021020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28697.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101021020221 its reverse (122020120101), we get a palindrome (223041140322).

The spelling of 101021020221 in words is "one hundred one billion, twenty-one million, twenty thousand, two hundred twenty-one".