2211220113155 has 4 divisors (see below), whose sum is σ = 2653464135792. Its totient is φ = 1768976090520.

The previous prime is 2211220113143. The next prime is 2211220113161. The reversal of 2211220113155 is 5513110221122.

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

It is a de Polignac number, because none of the positive numbers 2^k-2211220113155 is a prime.

It is a super-2 number, since 2×2211220113155² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221122011311 + ... + 221122011320.

It is an arithmetic number, because the mean of its divisors is an integer number (663366033948).

Almost surely, 2^{2211220113155} is an apocalyptic number.

2211220113155 is a deficient number, since it is larger than the sum of its proper divisors (442244022637).

2211220113155 is an equidigital number, since it uses as much as digits as its factorization.

2211220113155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442244022636.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 2211220113155 its reverse (5513110221122), we get a palindrome (7724330334277).

The spelling of 2211220113155 in words is "two trillion, two hundred eleven billion, two hundred twenty million, one hundred thirteen thousand, one hundred fifty-five".