102011101221 has 24 divisors (see below), whose sum is σ = 144543272544. Its totient is φ = 63981733120.

The previous prime is 102011101219. The next prime is 102011101229. The reversal of 102011101221 is 122101110201.

It is not a de Polignac number, because 102011101221 - 2¹ = 102011101219 is a prime.

It is a super-2 number, since 2×102011101221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102011101197 and 102011101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011101229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2312986 + ... + 2356676.

It is an arithmetic number, because the mean of its divisors is an integer number (6022636356).

Almost surely, 2^102011101221 is an apocalyptic number.

It is an amenable number.

102011101221 is a deficient number, since it is larger than the sum of its proper divisors (42532171323).

102011101221 is a wasteful number, since it uses less digits than its factorization.

102011101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46421 (or 46404 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102011101221 its reverse (122101110201), we get a palindrome (224112211422).

The spelling of 102011101221 in words is "one hundred two billion, eleven million, one hundred one thousand, two hundred twenty-one".