1200121011221 has 8 divisors (see below), whose sum is σ = 1313849154144. Its totient is φ = 1087163907120.

The previous prime is 1200121011211. The next prime is 1200121011241. The reversal of 1200121011221 is 1221101210021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200121011221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200121011196 and 1200121011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200121011211) 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, 192756446 + ... + 192762671.

It is an arithmetic number, because the mean of its divisors is an integer number (164231144268).

Almost surely, 2^{1200121011221} is an apocalyptic number.

1200121011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200121011221 is a deficient number, since it is larger than the sum of its proper divisors (113728142923).

1200121011221 is a wasteful number, since it uses less digits than its factorization.

1200121011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385519411.

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

Adding to 1200121011221 its reverse (1221101210021), we get a palindrome (2421222221242).

The spelling of 1200121011221 in words is "one trillion, two hundred billion, one hundred twenty-one million, eleven thousand, two hundred twenty-one".