1221454511122 has 16 divisors (see below), whose sum is σ = 1876941061632. Its totient is φ = 595808632480.

The previous prime is 1221454511111. The next prime is 1221454511131. The reversal of 1221454511122 is 2211154541221.

It is a happy number.

It is a super-2 number, since 2×1221454511122² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1975623 + ... + 2519125.

It is an arithmetic number, because the mean of its divisors is an integer number (117308816352).

Almost surely, 2^{1221454511122} is an apocalyptic number.

1221454511122 is a deficient number, since it is larger than the sum of its proper divisors (655486550510).

1221454511122 is a wasteful number, since it uses less digits than its factorization.

1221454511122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570953.

The product of its digits is 6400, while the sum is 31.

The spelling of 1221454511122 in words is "one trillion, two hundred twenty-one billion, four hundred fifty-four million, five hundred eleven thousand, one hundred twenty-two".