101012111221 has 8 divisors (see below), whose sum is σ = 119423185920. Its totient is φ = 83596229808.

The previous prime is 101012111209. The next prime is 101012111267. The reversal of 101012111221 is 122111210101.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-101012111221 is a prime.

It is a super-2 number, since 2×101012111221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101012114221) 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, 248798101 + ... + 248798506.

It is an arithmetic number, because the mean of its divisors is an integer number (14927898240).

Almost surely, 2^101012111221 is an apocalyptic number.

It is an amenable number.

101012111221 is a deficient number, since it is larger than the sum of its proper divisors (18411074699).

101012111221 is an equidigital number, since it uses as much as digits as its factorization.

101012111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497596643.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101012111221 its reverse (122111210101), we get a palindrome (223123321322).

The spelling of 101012111221 in words is "one hundred one billion, twelve million, one hundred eleven thousand, two hundred twenty-one".