1011221372111 has 8 divisors (see below), whose sum is σ = 1013827131648. Its totient is φ = 1008616815000.

The previous prime is 1011221372089. The next prime is 1011221372131. The reversal of 1011221372111 is 1112731221101.

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 1011221372111 - 2⁶ = 1011221372047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011221372131) 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, 1395836 + ... + 1992686.

It is an arithmetic number, because the mean of its divisors is an integer number (126728391456).

Almost surely, 2^{1011221372111} is an apocalyptic number.

1011221372111 is a deficient number, since it is larger than the sum of its proper divisors (2605759537).

1011221372111 is an equidigital number, since it uses as much as digits as its factorization.

1011221372111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601213.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 1011221372111 its reverse (1112731221101), we get a palindrome (2123952593212).

It can be divided in two parts, 1011 and 221372111, that added together give a palindrome (221373122).

The spelling of 1011221372111 in words is "one trillion, eleven billion, two hundred twenty-one million, three hundred seventy-two thousand, one hundred eleven".