2121101122355 has 4 divisors (see below), whose sum is σ = 2545321346832. Its totient is φ = 1696880897880.

The previous prime is 2121101122337. The next prime is 2121101122373. The reversal of 2121101122355 is 5532211011212.

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

It is an interprime number because it is at equal distance from previous prime (2121101122337) and next prime (2121101122373).

It is not a de Polignac number, because 2121101122355 - 2⁶ = 2121101122291 is a prime.

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, 212110112231 + ... + 212110112240.

It is an arithmetic number, because the mean of its divisors is an integer number (636330336708).

Almost surely, 2^{2121101122355} is an apocalyptic number.

2121101122355 is a deficient number, since it is larger than the sum of its proper divisors (424220224477).

2121101122355 is an equidigital number, since it uses as much as digits as its factorization.

2121101122355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424220224476.

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

Adding to 2121101122355 its reverse (5532211011212), we get a palindrome (7653312133567).

The spelling of 2121101122355 in words is "two trillion, one hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, three hundred fifty-five".