2121000222201 has 128 divisors (see below), whose sum is σ = 3539406274560. Its totient is φ = 1102379286528.

The previous prime is 2121000222199. The next prime is 2121000222203. The reversal of 2121000222201 is 1022220001212.

It is an interprime number because it is at equal distance from previous prime (2121000222199) and next prime (2121000222203).

It is not a de Polignac number, because 2121000222201 - 2¹ = 2121000222199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121000222203) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 376127740 + ... + 376133378.

It is an arithmetic number, because the mean of its divisors is an integer number (27651611520).

Almost surely, 2^{2121000222201} is an apocalyptic number.

2121000222201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2121000222201 is a deficient number, since it is larger than the sum of its proper divisors (1418406052359).

2121000222201 is a wasteful number, since it uses less digits than its factorization.

2121000222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121000222201 its reverse (1022220001212), we get a palindrome (3143220223413).

The spelling of 2121000222201 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two thousand, two hundred one".