1221001202122 has 32 divisors (see below), whose sum is σ = 1980892126080. Its totient is φ = 561110328000.

The previous prime is 1221001202063. The next prime is 1221001202171. The reversal of 1221001202122 is 2212021001221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221001202096 and 1221001202105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21043483 + ... + 21101425.

It is an arithmetic number, because the mean of its divisors is an integer number (61902878940).

Almost surely, 2^{1221001202122} is an apocalyptic number.

1221001202122 is a deficient number, since it is larger than the sum of its proper divisors (759890923958).

1221001202122 is a wasteful number, since it uses less digits than its factorization.

1221001202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61438.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221001202122 its reverse (2212021001221), we get a palindrome (3433022203343).

The spelling of 1221001202122 in words is "one trillion, two hundred twenty-one billion, one million, two hundred two thousand, one hundred twenty-two".