1201011202121 has 8 divisors (see below), whose sum is σ = 1226530528200. Its totient is φ = 1175759094400.

The previous prime is 1201011202093. The next prime is 1201011202147. The reversal of 1201011202121 is 1212021101021.

It can be written as a sum of positive squares in 4 ways, for example, as 53518195600 + 1147493006521 = 231340^2 + 1071211^2 .

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 1201011202121 - 2²² = 1201007007817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201011202096 and 1201011202105.

It is not an unprimeable number, because it can be changed into a prime (1201010202121) 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, 66795506 + ... + 66813483.

It is an arithmetic number, because the mean of its divisors is an integer number (153316316025).

Almost surely, 2^{1201011202121} is an apocalyptic number.

It is an amenable number.

1201011202121 is a deficient number, since it is larger than the sum of its proper divisors (25519326079).

1201011202121 is a wasteful number, since it uses less digits than its factorization.

1201011202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133609179.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201011202121 its reverse (1212021101021), we get a palindrome (2413032303142).

The spelling of 1201011202121 in words is "one trillion, two hundred one billion, eleven million, two hundred two thousand, one hundred twenty-one".