101211220011 has 64 divisors (see below), whose sum is σ = 152794791936. Its totient is φ = 59062012800.

The previous prime is 101211220007. The next prime is 101211220039. The reversal of 101211220011 is 110022112101.

It is not a de Polignac number, because 101211220011 - 2² = 101211220007 is a prime.

It is a super-2 number, since 2×101211220011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101211220051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81819285 + ... + 81820521.

It is an arithmetic number, because the mean of its divisors is an integer number (2387418624).

Almost surely, 2^101211220011 is an apocalyptic number.

101211220011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

101211220011 is a deficient number, since it is larger than the sum of its proper divisors (51583571925).

101211220011 is a wasteful number, since it uses less digits than its factorization.

101211220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

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

Adding to 101211220011 its reverse (110022112101), we get a palindrome (211233332112).

The spelling of 101211220011 in words is "one hundred one billion, two hundred eleven million, two hundred twenty thousand, eleven".