1221000202122 has 8 divisors (see below), whose sum is σ = 2442000404256. Its totient is φ = 407000067372.

The previous prime is 1221000202087. The next prime is 1221000202129. The reversal of 1221000202122 is 2212020001221.

It is a sphenic number, since it is the product of 3 distinct primes.

1221000202122 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1221000202129) 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, 101750016838 + ... + 101750016849.

It is an arithmetic number, because the mean of its divisors is an integer number (305250050532).

Almost surely, 2^{1221000202122} is an apocalyptic number.

1221000202122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221000202122 is a wasteful number, since it uses less digits than its factorization.

1221000202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203500033692.

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

Adding to 1221000202122 its reverse (2212020001221), we get a palindrome (3433020203343).

The spelling of 1221000202122 in words is "one trillion, two hundred twenty-one billion, two hundred two thousand, one hundred twenty-two".