101021011021221 has 8 divisors (see below), whose sum is σ = 142617897912384. Its totient is φ = 63385732405440.

The previous prime is 101021011021181. The next prime is 101021011021223. The reversal of 101021011021221 is 122120110120101.

It is a happy number.

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

It is not a de Polignac number, because 101021011021221 - 2³⁹ = 100471255207333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101021011021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101021011021223) 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, 990402068785 + ... + 990402068886.

It is an arithmetic number, because the mean of its divisors is an integer number (17827237239048).

Almost surely, 2^{101021011021221} is an apocalyptic number.

It is an amenable number.

101021011021221 is a deficient number, since it is larger than the sum of its proper divisors (41596886891163).

101021011021221 is a wasteful number, since it uses less digits than its factorization.

101021011021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980804137691.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101021011021221 its reverse (122120110120101), we get a palindrome (223141121141322).

The spelling of 101021011021221 in words is "one hundred one trillion, twenty-one billion, eleven million, twenty-one thousand, two hundred twenty-one".