1202221210121 has 8 divisors (see below), whose sum is σ = 1277535561480. Its totient is φ = 1127417465088.

The previous prime is 1202221210097. The next prime is 1202221210207. The reversal of 1202221210121 is 1210121222021.

It can be written as a sum of positive squares in 4 ways, for example, as 194887814521 + 1007333395600 = 441461^2 + 1003660^2 .

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 1202221210121 - 2³⁸ = 927343303177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202221210121.

It is not an unprimeable number, because it can be changed into a prime (1202221210321) 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, 127646726 + ... + 127656143.

It is an arithmetic number, because the mean of its divisors is an integer number (159691945185).

Almost surely, 2^{1202221210121} is an apocalyptic number.

It is an amenable number.

1202221210121 is a deficient number, since it is larger than the sum of its proper divisors (75314351359).

1202221210121 is a wasteful number, since it uses less digits than its factorization.

1202221210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255303163.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1202221210121 its reverse (1210121222021), we get a palindrome (2412342432142).

The spelling of 1202221210121 in words is "one trillion, two hundred two billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".