102021101221 has 8 divisors (see below), whose sum is σ = 110025619704. Its totient is φ = 94038974400.

The previous prime is 102021101197. The next prime is 102021101239. The reversal of 102021101221 is 122101120201.

It can be written as a sum of positive squares in 4 ways, for example, as 37816636225 + 64204464996 = 194465^2 + 253386^2 .

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 102021101221 - 2⁷ = 102021101093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021101291) 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, 5588446 + ... + 5606671.

It is an arithmetic number, because the mean of its divisors is an integer number (13753202463).

Almost surely, 2^102021101221 is an apocalyptic number.

It is an amenable number.

102021101221 is a deficient number, since it is larger than the sum of its proper divisors (8004518483).

102021101221 is a wasteful number, since it uses less digits than its factorization.

102021101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195831.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102021101221 its reverse (122101120201), we get a palindrome (224122221422).

The spelling of 102021101221 in words is "one hundred two billion, twenty-one million, one hundred one thousand, two hundred twenty-one".