2211212132121 has 4 divisors (see below), whose sum is σ = 2948282842832. Its totient is φ = 1474141421412.

The previous prime is 2211212132099. The next prime is 2211212132123. The reversal of 2211212132121 is 1212312121122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2211212132121 - 2¹³ = 2211212123929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211212132123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368535355351 + ... + 368535355356.

It is an arithmetic number, because the mean of its divisors is an integer number (737070710708).

Almost surely, 2^{2211212132121} is an apocalyptic number.

It is an amenable number.

2211212132121 is a deficient number, since it is larger than the sum of its proper divisors (737070710711).

2211212132121 is an equidigital number, since it uses as much as digits as its factorization.

2211212132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737070710710.

The product of its digits is 192, while the sum is 21.

Adding to 2211212132121 its reverse (1212312121122), we get a palindrome (3423524253243).

The spelling of 2211212132121 in words is "two trillion, two hundred eleven billion, two hundred twelve million, one hundred thirty-two thousand, one hundred twenty-one".