101220011 has 4 divisors (see below), whose sum is σ = 106547400. Its totient is φ = 95892624.

The previous prime is 101220001. The next prime is 101220013. The reversal of 101220011 is 110022101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101220011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663666 + ... + 2663703.

It is an arithmetic number, because the mean of its divisors is an integer number (26636850).

Almost surely, 2^101220011 is an apocalyptic number.

101220011 is a deficient number, since it is larger than the sum of its proper divisors (5327389).

101220011 is an equidigital number, since it uses as much as digits as its factorization.

101220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327388.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 101220011 is about 10060.8156230000. The cubic root of 101220011 is about 466.0388551538.

Adding to 101220011 its reverse (110022101), we get a palindrome (211242112).

It can be divided in two parts, 101 and 220011, that multiplied together give a triangular number (22221111 = T₆₆₆₆).

The spelling of 101220011 in words is "one hundred one million, two hundred twenty thousand, eleven".