1220222132121 has 16 divisors (see below), whose sum is σ = 1639856312640. Its totient is φ = 807056141760.

The previous prime is 1220222132119. The next prime is 1220222132183. The reversal of 1220222132121 is 1212312220221.

It is not a de Polignac number, because 1220222132121 - 2¹ = 1220222132119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220222132191) 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, 2454090 + ... + 2909123.

It is an arithmetic number, because the mean of its divisors is an integer number (102491019540).

Almost surely, 2^{1220222132121} is an apocalyptic number.

It is an amenable number.

1220222132121 is a deficient number, since it is larger than the sum of its proper divisors (419634180519).

1220222132121 is a wasteful number, since it uses less digits than its factorization.

1220222132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363816.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1220222132121 its reverse (1212312220221), we get a palindrome (2432534352342).

The spelling of 1220222132121 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred thirty-two thousand, one hundred twenty-one".