1211200220001 has 8 divisors (see below), whose sum is σ = 1615549788864. Its totient is φ = 807158732240.

The previous prime is 1211200219973. The next prime is 1211200220047. The reversal of 1211200220001 is 1000220021121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211200220001 - 2⁵ = 1211200219969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211200220081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77011101 + ... + 77026826.

It is an arithmetic number, because the mean of its divisors is an integer number (201943723608).

Almost surely, 2^{1211200220001} is an apocalyptic number.

It is an amenable number.

1211200220001 is a deficient number, since it is larger than the sum of its proper divisors (404349568863).

1211200220001 is a wasteful number, since it uses less digits than its factorization.

1211200220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154040551.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1211200220001 its reverse (1000220021121), we get a palindrome (2211420241122).

The spelling of 1211200220001 in words is "one trillion, two hundred eleven billion, two hundred million, two hundred twenty thousand, one".