2111221220101 has 16 divisors (see below), whose sum is σ = 2462134550400. Its totient is φ = 1809567483360.

The previous prime is 2111221220041. The next prime is 2111221220113. The reversal of 2111221220101 is 1010221221112.

It is not a de Polignac number, because 2111221220101 - 2²³ = 2111212831493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111221220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17240250 + ... + 17362276.

It is an arithmetic number, because the mean of its divisors is an integer number (153883409400).

Almost surely, 2^{2111221220101} is an apocalyptic number.

It is an amenable number.

2111221220101 is a deficient number, since it is larger than the sum of its proper divisors (350913330299).

2111221220101 is an equidigital number, since it uses as much as digits as its factorization.

2111221220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172489 (or 172475 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111221220101 its reverse (1010221221112), we get a palindrome (3121442441213).

The spelling of 2111221220101 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, one hundred one".