1211320222021 has 8 divisors (see below), whose sum is σ = 1490855657984. Its totient is φ = 958407208560.

The previous prime is 1211320222009. The next prime is 1211320222031. The reversal of 1211320222021 is 1202220231121.

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 1211320222021 - 2⁵ = 1211320221989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211320222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211320222031) 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, 6655605525 + ... + 6655605706.

It is an arithmetic number, because the mean of its divisors is an integer number (186356957248).

Almost surely, 2^{1211320222021} is an apocalyptic number.

It is an amenable number.

1211320222021 is a deficient number, since it is larger than the sum of its proper divisors (279535435963).

1211320222021 is a wasteful number, since it uses less digits than its factorization.

1211320222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13311211251.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1211320222021 its reverse (1202220231121), we get a palindrome (2413540453142).

It can be divided in two parts, 1211320 and 222021, that added together give a palindrome (1433341).

The spelling of 1211320222021 in words is "one trillion, two hundred eleven billion, three hundred twenty million, two hundred twenty-two thousand, twenty-one".