1221001202012 has 12 divisors (see below), whose sum is σ = 2157908065656. Its totient is φ = 604456040400.

The previous prime is 1221001201997. The next prime is 1221001202027. The reversal of 1221001202012 is 2102021001221.

It is an interprime number because it is at equal distance from previous prime (1221001201997) and next prime (1221001202027).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511139698 + ... + 1511140505.

It is an arithmetic number, because the mean of its divisors is an integer number (179825672138).

Almost surely, 2^{1221001202012} is an apocalyptic number.

It is an amenable number.

1221001202012 is a deficient number, since it is larger than the sum of its proper divisors (936906863644).

1221001202012 is a wasteful number, since it uses less digits than its factorization.

1221001202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022280308 (or 3022280306 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221001202012 its reverse (2102021001221), we get a palindrome (3323022203233).

The spelling of 1221001202012 in words is "one trillion, two hundred twenty-one billion, one million, two hundred two thousand, twelve".